Forensic Science Midterm
How long does a light meal typically take to digest?
1-2 hours
How long do casts of impressions need to sit before they can be analyzed?
24 hours
How many crime scenes are there currently in the United States?
320
How many full-length strands of hair are collected from the scalp to use as a sample?
50
What is the system used to classify blood types known as?
A-B-O system
What should be done before a crime scene is photographed?
Any items that were already moved should be documented.
In investigating a drive-by shooting, forensic scientists were able to identify the weapon used and tie it back to a perpetrator already in the crime database. Who can they thank for the techniques for identification?
Calvin Goddard
If a bleached strand of hair that was wavy, had evenly distributed pigments, and a round cross-section was analyzed, it would indicate the owner was MOST likely:
Caucasian
An investigator has a strong suspicion that a hair sample from a suspect will match one found at the scene of a crime. To reliably and efficiently show the samples match, the investigator would turn to:
DNA analysis.
Marta was attending a symposium/lecture at the Forensic Anthropology Facility. What is the MOST likely title of the speech?
Decomposing: Writing about Rot
Concentric fractures, which form a circle around a point of impact, tend to occur first when a glass is struck.
False
Forensic pathologists and anthropologists are usually able to identify the exact moment in time that death occurs.
False
Forensic scientists reliably provide exact times of death based on their analyses.
False
Good scientific analysis can overcome poorly collected evidence.
False
The photographs of the crime scene should all be close-ups of the evidence to show its detail.
False
The properties of hair do not change as we age.
False
Amir detected a firearm on the premises. Given how most firearms are found, what most likely alerted him to its presence?
He saw it while searching a room.
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He used the same gun for both crimes.
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Heat can accelerate the rate of rigor mortis.
A bullet that was used in a recent bank robbery has been secured. It is now trying to be determined if there is a link to other recent robberies in the area. What would be the BEST database to check to find this info?
IBIS
Why would an investigator never take a tool suspected of being used at a crime scene and try it out in a tool mark to see if it fits?
It could alter the original tool mark.
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It could cause the gun to rust.
Why do gun manufacturers give each type of gun a distinct pattern of grooves in the barrel?
It helps law enforcement more easily identify weapons.
A blood spatter is found at a crime scene that is nearly a perfect circle. What is the MOST likely explanation for how the blood stain got on the surface?
It hit the surface from a 90-degree angle.
What is the most common reason that evidence is excluded from a trial in the United States?
It is a Fourth Amendment violation.
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No, because they share mitochondrial DNA.
The "Body Farm" is located in which US state?
Tennessee
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The Fourth Amendment
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The are dead.
How do bullets get individual characteristics?
The barrel leaves markings as the bullet passes through.
If trying to determine how far from a victim a shot took place, what factor would MOST interfere with the analysis?
The gun used in the incident hasn't been found.
Which is a benefit of traditional SLR cameras over digital cameras?
They produce negatives to serve as backups.
A Chinese book has the first written record of medical knowledge of solving crime in a description of how to distinguish between strangulation and drowning.
True
A scale, like a ruler, should be included in photographs of impressions to help show the size of the impression.
True
Any wet clothing from a victim should be air-dried before it is packaged.
True
Arch fingerprints are the least common type of fingerprints in the population.
True
At a distance of more than three feet from gun to target, there will generally NOT be signs of gunpowder on the target.
True
Calvin Goddard found a way of using a comparison microscope to improve this technique to better match bullets.
True
Like other bodily processes, digestion ceases when a person dies.
True
The diameter of the gun barrel is known as the caliber.
True
The rough sketches will contain measurements to allow later drawings to be drawn to scale.
True
The type of insects and the stage of the insect's life can give some indication of how long a body has been dead.
True
Which of the following would be the most appropriate way to store or transport a sample of blood?
Wet blood is allowed to first air dry before a scraping is taken.
Why is blood found at a crime scene often allowed to dry before taking a sample?
Wet blood samples can degrade.
At the scene of a crime, Kerian used a piece of paper that turned green when placed on a potential blood sample. What is that test called?
a Hemastix strip
What's most likely to be included in a close-up photograph taken at a crime scene?
a blood splatter
What's most likely to be included in an intermediate photograph taken at a crime scene?
a body spread out on a bed
Which of the items is MOST likely to leave an identifiable tool mark?
a bone knife missing a chip in its blade
What is bleach changing the color of a pH test strip is an example of?
a chemical property
What do shots fired at a target from a distance of one inch or less leave behind?
a circle of lead concentrated around the bullet hole
What is a distinctive characteristic of putrefaction?
bloating
What are raised areas created by cuts into a gun barrel called?
lands
What type of evidence found at a crime scene would a digital forensic scientist be most interested in?
laptop
A set of cells that runs through the hair is called a:
medulla.
What type of DNA is easiest to collect from cells?
mitochondrial DNA
The biggest difference between expert witnesses and regular citizens who are called as witnesses is that expert witnesses can base their testimony on:
personal and specialized knowledge.
What do valid tests used by forensic scientists need to be?
reproducible
If a body is buried, the process of complete _____ can take up to two years to complete.
skeletonization
Why would someone grind the serial number off of their gun?
so the gun couldn't be traced to them
Gunpowder residue found on a person's hands, can only explain what?
that they recently fired a gun
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the CCTV recording
What is the influence of crime investigation TV series on the public's perception of law enforcement work and courtroom procedures called?
the CSI effect
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the crime scene
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the digital rendering of the crime scene that shows where the gun was fired from
Which types of investigations would MOST likely rely on forensic anthropology?
the discovery of a skull underneath a building after it burned down unexpectedly
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the gun used in the crime
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the house, yard, and street in front of it
Where would gunpowder residue MOST likely appear on a shooter's hands?
the thumb web
In a gun homicide case, what should police remove to study later for bullet holes and gunpowder residue?
the victim's clothes
Which of the following factors can complicate analysis of post-mortem cooling?
the victim's size
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the voicemails from Isabel
What is the very first thing an analyst reaches for when they find a tool mark?
their camera
Taphonomy is the study of what happens to animals or humans between when they die and when:
their remains are found.
Before someone is arrested, a suspect is informed of his Miranda rights. Among other things, what did this inform them of?
their right to legal representation/a lawyer
Class characteristics serve as corroboration for other, more subjective pieces of evidence in a courtroom (like witness testimony).
True
Collection of evidence is often conducted by police officers, not forensic scientists.
True
DNA is not always available in a hair sample.
True
Each piece of evidence that is collected should be placed in a separate container.
True
Even when bullets of the same ammunition are fired from the same gun, the bullets are generally not a 100 percent match for each other.
True
In order to be valid, a particular test has to be reliable, sensitive, and specific.
True
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a known sample from Alex
Which piece of evidence might a digital forensics expert analyze?
a laptop in an online fraud scheme that illegally captured the credit card numbers
Which of the following is an element of the chain of custody?
a list of all people who had possession of the evidence
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a little less than a year
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between 8 and 16
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forensic pathologist
In a highly publicized criminal case, the defense requires a testimony regarding the presences of curare, a type of muscle relaxant, found in the tissue of the victim. Which type of forensic scientist would be BEST?
forensic pathology
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forensic psychiatry
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forensic sociologist
A crime scene is being searched and a faint fingerprint is found on the door of the refrigerator. What is this type of fingerprint called?
latent
Several distinct changes take place in the body after a person dies; which one can tell us MOST about whether the corpse was moved?
livor mortis
What is the settling of blood in the lowest parts of the body?
livor mortis
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no insects
Upon arriving at a crime scene, Alice begins drawing what she sees while her partner secures the area. What type of sketch is she MOST likely creating?
rough sketch
A gun in found that has been hastily discarded in a full aquarium. What should be done to transport it to the lab?
scoop up the gun and some aquarium water in a basin and carry both to the lab
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scrapings from under Sinead's fingernails
A tiny speck of blood is found on a suspect's shirt. What would this be considered?
trace evidence
What is small, often hard to find evidence such as hair or fibers called?
trace evidence
Claude is a police officer and has just arrived at an apartment that is being considered a crime scene. He secures the site by only allowing whom into the apartment?
trained forensic professional
Which tasks falls under the responsibility of a forensic scientist?
training officers in how to collect evidence
What is the process called that uses radiologic methods like MRIs to image a victim in 3D and create a digital record to review later on?
virtopsy
When searching a crime scene a fingerprint was found that was made after someone touched blood. What is this type of fingerprint called?
visible
What action would allow officers to search a home even if they didn't have a warrant?
A spouse lets them into the house and tells them they can search it.
Within about three hours after death, what happens to the eyes?
A thin, cloudy film develops.
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8 a.m. Monday
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8-18 days
Why should soil samples be analyzed when they are dry?
Being wet changes the color and texture of soil.
Who established one of the first sites of systematic research on the decomposition of human remains?
Bill Bass
Why are holes wider on the "exit side" when bullets go through glass in a way that isn't true for, say, a thrown small stone?
Bullets travel at a much higher velocity.
In which direction does the tail end of a blood spot point?
It points in the direction of motion.
Which forensic scientist was, in part, responsible for the very specific evidence collection guidelines that exist in an effort to avoid cross-contamination during the collection process?
Edmond Locard
An impact blood stain results when blood falls onto a surface due to gravity.
False
As officers of the law, forensic scientists carry guns, interrogate suspects, and help with arrests.
False
At most crime scenes, investigators should expect to find full fingerprints.
False
In Western civilization, fingerprinting has been used in crime detection for many hundreds of years.
False
Only in-person identification (from, e.g., a police standup line) is admissible in court as eyewitness identification.
False
The rate of temperature lost in a body starts slowly, then accelerates as more time has passed since death.
False
When a bullet is fired, gunpowder only travels back toward the shooter.
False
With the rise of digital photography, courts have begun accepting digitally enhanced photographs as a matter of course.
False
Which would be the BEST way to establish that a suspect has used a tool or firearm identified as used in a crime?
Fingerprints are found on the tool or firearm that match the suspect.
Who showed the uniqueness of fingerprints and how they could be used for identification?
Francis Galton
How do shooters get gunpowder residue on their hands?
It travels backward from the gun.
When the drug heroin comes into contact with the Marquis reagent chemical, what happens?
It turns purple.
If blood were to fall onto a couch cushion, how would it's spatter compare to if it fell on a ceramic tile?
It would spatter less.
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Janine's hairbrush
Blood type O negative is highly valuable because it can be given to almost anyone in a life-threatening emergency. Who discovered this system of categorizing blood?
Karl Landsteiner
What test can be used to determine if a stain is blood or not?
Kastle-Meyer Color Test
The oldest forensic laboratory in the United States was built by whom?
Los Angeles Police Department
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Luminol testing
A forensic pathologist is called upon to do an autopsy on a person who was found dead in their home from a potential overdose. Which scientist's contribution to forensics serves as the basis upon which the findings rely?
Mathieu Orfila
Who is known as the father of toxicology?
Mathieu Orfila
It's the year 2000. Zahara, an FBI agent, has found bullet cases at the scene of a crime and suspect they came from a gun used in another crime. To verify, Zahara should use:
NIBIN
Samantha is positive that two bullets came from a particular gun, but testing can't prove it. What could be the reason preventing her from proving that two bullets share a common firing source?
One of the bullets was deformed when it hit a target.
Clayton has found a few strands of hair and has found a relatively large amount of follicular tissue. Which of the following is MOST likely TRUE?
The hair was removed in a physical altercation.
If forensic scientists are trying to match a shoe to footprints found at the scene, what element in the shoe impression is most likely to indicate the shoe belonged to a particular person/suspect?
The print reveals a broken tread and gouges in the soles.
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The victim died around 7:10 p.m.
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The victim died at least eight hours before the body was flipped.
While investigating the scene of a crime, which of the following can be noted as an example of an indicative act?
The victim had made a 12-minute phone call to their sister within an hour of when the body was found.
Ryan discovered a body of a hiker in a dense forest. Analysis shows considerable insect activity on and around the body and swelling to the victim's abdomen. What can he determine about the hiker?
The victim has been dead for at least four days.
Joachim finds gunpowder residue on a shooting victim in an alley. The victim, a young woman known to be skittish and a good runner, was shot in the forehead. What could he surmise about the victim and their attacker?
The victim trusted her attacker.
Omari finds a victim of a gunshot to the head laying limply on their back, with dark purple discoloration on the front of their body (the chest area especially). What might Omari conclude?
The victim was moved after his death.
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There is no gunpowder residue around the bullet hole.
Which of the following statements is MOST TRUE regarding the use of testimony on hair samples in courts today?
There's solid research that should lead us to be skeptical of testimony based on hair samples.
For glass fragments to be individualized, what must be TRUE?
They must fit together.
Concentric fractures in a piece of glass look MOST like:
a circle.
A potential murder weapon has been secured and has fired test bullets with it. Along with the bullets fired on-scene, what tool would be used next?
a comparison microscope
A suspect is on the run in a dry, wooded area; they've ditched the gun but are hiding from police enforcement. How long do you have to find them before vital proof they fired a gun will probably no longer be on their bod
a few hours
An investigation is well underway, and several photographs, prior drawings, and notes to draw a picture of the crime scene are being used. What is being produced?
a finished sketch
Molds might be used to collect what type of evidence?
a footprint
Which forensic scientist would be called if the police wanted to know what the facial structure of a decomposed body looked like when the person was alive?
a forensic anthropologist
During a Black Lives Matter protest, a group of protesters were gravely injured by activists on the other side. Who might prosecutors call in to provide expert testimony in a case against those accused of the violence?
a forensic sociologist
What's MOST likely included in an overview photograph taken at a crime scene?
a full room
Which might be an individual characteristic in an impression of a shoe print?
a gouge in the tread of the shoe
While on the scene of a crime, Shia begins to record various pieces of information. Which of the things recorded is an example of a mechanism of death?
a pillow used to suffocate someone
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a plastic print
What is an example of Locard's Exchange Principle?
a police officer leaving a fingerprint at a crime scene
Micah has collected a small amount of soil he believes a suspect left behind in a boot print at a crime scene. What type of sample is this?
a questioned sample
After arriving at the scene, Jason finds the victim's body and determines that rigor mortis had just begun to set in. In which condition did Jason MOST likely find the body?
a rigid "death's grin"
What is typically used to record the dimensions of a crime scene?
a rough sketch
What might a forensic scientist use to examine an object's physical properties?
a scale
A murder occurred in a house. However, investigators also search a suspect's car. What are they searching?
a secondary crime scene
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a self-inflicted wound
What would a halo of smoke near a bullet wound indicate?
a shooter about a foot away from the victim
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a steel die stamping device
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a subpoena
Forensic scientists use the process of comparison to determine if what is TRUE?
a suspect sample and a known sample match
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about 4 months
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about 4 years
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about two hours ago
What is the creation of a waxy substance when there is hydrogenation of the fat in the body called?
adipocere
The gradual cooling of the body after death until it reaches the temperature of the air around it is called _____ mortis.
algor
What can be used to recover serial numbers that have been ground off of a gun?
an etching agent
What would scorch marks on fabric near a bullet wound indicate?
an extremely close shooter—within an inch or less
The earliest forensic toxicology publication focused on poisons and how they impacted which group?
animals
After examining a person's skeleton, which detail might lead a forensic anthropologist to believe the person was over age 60?
arthritis in the knee joint
How long does a hair sample need to be to be analyzed for mitochondrial DNA?
at least 1 centimeter
Bloodstains and hairs are known as what kind of evidence at a crime scene?
biological
What would be an example of a chemical property?
bleach changing the color of a pH test strip
While on the scene of a crime, Marvin begins to record various pieces of information. Which of the things recorded is an example of a cause of death?
blunt force trauma
What is the barrel of a gun also known as?
bore
How do forensic scientists studying hair samples tell how long it has been since someone dyed their hair?
by how much new growth there is
If a police officer untrained in forensic science was asked to collect evidence at a crime scene, how might they inadvertently contaminate evidence?
by not wearing gloves
Ebony has been asked to pick up a firearm at a crime scene. How should the firearm be picked up to preserve the evidence?
by the trigger guard
What is the internal diameter of a gun barrel known as?
caliber
A bullet is embedded in the wall of a crime scene. How should it be removed it to preserve possible markings on the bullet?
carefully remove wall material from around the bullet
What is a list of all people who had possession of a piece of evidence called?
chain of custody
Luminol, which reacts with blood stains to create a faint light, is sprayed at a crime scene. What property of blood is creating this reaction?
chemical property
Every gun model creates an identifiable pattern on the bullets fired from it; what is this type of characteristic called?
class characteristics
What did forensic scientist Francis Galton develop a method of doing?
classifying fingerprints
The _____ bone doesn't stop growing until around age 25, so it can help forensic anthropologists determine the age of a person whose skeletal remains are found.
clavicle
An investigator takes a photograph that includes a dollar bill as a size reference. This is most likely what type of photograph?
close-up photograph
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cordon off the area so that no one else can enter the premises
Forensic science is the application of science to what field?
criminal justice
Evidence, such as a crime scene model, that is used to help recreate or illustrate a crime is considered what type of evidence?
demonstrative evidence
What is an example of the analytic process of comparison?
determining that a sample of blood from a crime scene belonged to a suspect
A cyber agent is an expert in what type of forensics?
digital
A large online credit card hack involving multiple financial institutions resulted in the loss of billions of dollars. Which type of forensics would MOST likely be called to investigate the case?
digital forensics
In 2013, Target had a massive data breach that affected 110 million customers. What type of experts were brought in to help find evidence?
digital forensics
Written and recorded evidence of a crime, such as CCTV video is considered what type of evidence?
documentary evidence
A cybersecurity specialized who has published a book on selling data on the black market might be called upon to testify in an identity theft case in what capacity?
expert witness
Although many types of witnesses can testify at a trial, what is the testimony called from a person who actually saw the crime take place?
eyewitness
Which technique can forensic anthropologists sometimes use to identify a victim?
facial reconstruction
Who is MOST likely to perform a forensic autopsy?
forensic pathologist
When analyzing the AFIS database, one would be looking for a match to what type of sample?
fingerprint
What type of system did Sir Edward Henry develop in 1900?
fingerprint identification
By the early 1900s, what type of evidence was being collected at crime scenes to help positively identify suspects by one particularly unique trait?
fingerprints
Loops, whorls, and arches are types of what?
fingerprints
What type of evidence might be collected using a chemical developer?
fingerprints
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fingerprints found on the crowbar and on the glass
Determining that the shot that created a bullet hole came from 10 feet away at a 45° angle is an example of:
firearm identification.
Hasan is missing his normal equipment but needs to transport a bullet from the crime. In an attempt to protect the bullet, which process would be BEST to use?
fold it in a clean piece of paper
What part of the hair do forensic specialists look at to help determine whether the strand was more likely to have been pulled out or fell out naturally?
follicular tissue
When an ancient cemetery was found in Germany in 2016, which sub-field of forensics was MOST likely called upon?
forensic anthropology
What is the study of insect activity at crime scenes for the purpose of reconstructing a crime and determining when a death occurred?
forensic entomology
Ashanti has an interest in a community where there have been repeated conflicts between white supremist groups and the police. Which sub-field of forensics would BEST suit Ashanti's interests?
forensic sociology
What term is used to describe the study of poison's effect on the human body?
forensic toxicology
What would forensic scientists examine to determine the order in which shots were fired into a single window?
fractures radiating out from each bullet hole
The physical properties of density and refractive index are used to identify and analyze:
glass.
What causes livor mortis?
gravity causes blood to pool
Low areas cut into a gun barrel are called:
grooves
A student asks a teacher why some crustaceans have blue blood and some worms have green blood. A good answer would be that these creatures don't have the protein called:
hemoglobin
Andrea is performing an autopsy on a female victim found buried in the woods behind a school. During the examination she discovers maggots in the victim's tissue. What might that help her determine?
how long the body was left there
What did forensic scientist Leone Lattes discover?
how to determine blood type from a dried bloodstain
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identification
If a blood stain caused by a gunshot was found at a crime scene, what type of stain would this blood be considered?
impact
In a hit-and-run investigation, officers find tire tracks in the mud near the victim. This is known as what kind of evidence?
impression evidence
Where do forensic science specialists spend most of their working time?
in a laboratory
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individual
An investigator takes a photo of a body that included a dropped knife nearby, along with some bloody footprints. What type of photograph is this?
intermediate photograph
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known sample
What is the first step you would take when planning to collect a firearm in a crime scene?
look around for any danger and ensure that the gun won't accidentally fire
What is the most common type of fingerprint?
loops
An investigator arrives at the scene of a robbery and finds a gun that has slid under a counter. What is the first thing they should be doing with the gun?
making sure it will not accidentally discharge
What would be an example of a class characteristic?
matching tire treads to a certain model of tire
Jack has a strand of hair from a crime scene but can't tell if it is from an intruder or the family dog. If the hair otherwise looks similar on initial examination, Jack would want to examine the:
medulla
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medulla
Mo is looking for a "Glock 9" firearm. Based on what Mo knows about how guns are measured, what does the "9" in the gun's name refer to?
millimeters of the gun's internal diameter
The ridge characteristics, enclosures and other details that make up a fingerprint are called ridge characteristics or:
minutiae
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mitochondrial DNA
Malik is using a microscope to compare two strands of hair to see if they match. What is Malik analyzing?
morphology
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noon Monday
By isolating a certain segment of your DNA, an analyst tells you that it shows you have your father's eye shape but your maternal grandmother's eye color. Which type of DNA is indicating this?
nuclear DNA
Where would an investigator mark a collected bullet with their own initials?
on the base
Diseases that affect you when you're alive can leave clues on your body for forensic anthropologists. Even many years after death, where do diseases like tuberculosis and periodontal disease leave indicators?
on the bones
For what type of crime scene photo would a wide-angle lens be used?
overview photograph
Firearms should be stored in what type of package?
paper bag
Which kind of bloodstain develops due to gravity?
passive
Medical coroners could be considered to be MOST like what other type of forensic scientists?
pathologists
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perform a Greiss test
What can a forensic pathologist do to learn about how and when a person died?
perform an autopsy
Tangible evidence found at the scene, such as a weapon or fiber sample is considered what type of evidence?
physical evidence
What are forensic scientists often called upon to testify about?
physical evidence related to a crime
Which of the following BEST represents a chain of custody?
picking up a knife at a crime scene, sending it to a crime lab, storing it in a police locker
What is the technical term for post-mortem stiffness that occurs when the body's metabolic processes stop after death?
rigor mortis
A forensic psychiatrist is MOST likely to be called to give expert testimony in a criminal case where the defendant did what?
pled insanity
When a killer wants to make a death look natural, what method are they most likely to use?
poison
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precipitin test
Jordan flips a coin 50 times, counting how often it comes up heads and how often it comes up tails. What is Jordan determining?
probability
When collecting evidence, guns should be unloaded before they are transported for safety. What should be done with the bullets removed from the gun?
put each one in a separate envelope
Researchers at the "Body Farm" bury bodies in the ground, lock them in car trunks, and submerge them in water to help forensic experts learn more about:
rates of decay of the human body.
What gives fingerprints their unique characteristics?
ridge characteristics
What are spiral grooves cut into the barrel of a gun in order to make a bullet spin as it is fired are known as?
rifling
Clara is asked to take a hair sample by cutting the strands rather than pulling them out. Where would she make the cut?
right at the skin line
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she is not in formal custody.
What is used to make a cast of a tool mark?
silicone rubber
Forensic anthropologists asked to help identify victims are most likely to rely on:
skeletal remains.
Color, texture, and presence of vegetation or animal material all can help identify/classify what type of material?
soil
Radial fractures in a piece of glass look MOST like:
spokes of a wheel
Which task might a first responder be expected to perform?
stabilize the wounds of an injured person at the scene
How do manufacturers ensure that each gun can be individually identified?
stamp it with a serial number
While on the scene of a crime, Makela begins to record various pieces of information. Which of the things recorded is an example of a manner of death?
suicide by hanging
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suspect C
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take an impression
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take photographs
What is the first step in recording an impression?
taking a photograph
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taphonomy
A witness in court tells a jury that they heard an argument coming from a house the night someone was shot. What is the witness providing?
testimony
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that Cecil handled the gun
Sarah is determining the time of death for a corpse. If true, what factor would she note as MOST important in determining time of death?
that the body was found in a basement and showed signs of stiffness
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the EMT team
In addition to the direction the blood was traveling, what else can a blood spatter pattern indicate?
the angle the blood hit a surface
Digital crime scene photos should always include what type of informational tag?
the file name and exposure
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the fingerprints left on the gun
Walter claims he was shot in the shoulder while sitting at his kitchen table by a man who was six feet four. What type of evidence at the crime scene might you analyze to tell you if that scenario is true?
the impact stain
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the paint scraping showing several layers of paint
When analyzing a strand of hair, DNA would first try to be taken from which general location?
the point closest to the scalp
Vonna finds a body with a temperature of 90°F. All other things being equal/typical, when would Vonna guess the victim died?
three to four hours ago
Forensic odontologists might be involved in which of the following circumstances?
to investigate a bite mark on a victim's arm
Why is it important to immediately take high-quality crime scene photos, sketches, and notes?
to preserve a record of the crime scene before it's disturbed
When collecting evidence, why should a gun be stored in a paper bag?
to prevent it from getting moist
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to see if she could identify the suspect in the photos
What is the purpose of an intermediate crime scene photograph?
to show evidence in relation to nearby objects
In terms of individual characteristics of a weapon, what is the equivalent to bullet striations for a weapon like an axe?
tool marks
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use the crowbar to recreate the prying action on a similar piece of wood
To collect impressions found in dust, scientists use a device that:
uses a negative charge to create an image on a plastic-coated metal sheet.
A robbery occurs late at night at a convenience store. A nearby traffic camera captures the perpetrator leaving the scene. This is a form of what type of evidence?
video evidence
Ki finds a body in a kitchen with undigested eggs and bacon in its stomach. Knowing the victim had a set routine they followed most mornings, what would KI then check to most narrow in on the time of death?
what time the victim usually ate breakfast
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whether the doors and windows in the room were open or closed
Fingerprints with ridge patterns that have two deltas are called:
whorl fingerprints
How soon are blowflies present in and around a dead body?
within the first three days after death
