FS1 Chapter 2: The Crime Scene

The presence of blood and semen at crime scenes exposes investigators to:

Hepatitis B, AIDS (Both a and b)

When biological samples of unknown origin are discovered at a crime scene, investigators:

Should assume no pathogens are present and treat the samples as such.

The first officer arriving at the crime scene, after providing or obtaining medical assistance for the injured and effecting an arrest of suspects, should immediately

Secure the scene

Success in the recognition and collection of physical evidence is determined primarily by the:

Skill of personnel processing the crime scene.

The size and location of the crime scene, as well as the events that occurred there, will determine:

The kind of search pattern that is used to locate evidence

Changes to evidence, such as contamination, can be prevented by handling evidence with:

Latex gloves, Disposable forceps (a & c)

substrate control

Uncontaminated surface material close to an area where physical evidence has been deposited

Investigators should collect possible carriers of trace evidence which may include:

Vacuum sweepings, clothing, fingernail scrapings. (all of the above)

The purpose of the crime scene search is to locate:

all physical evidence

The most basic methods of crime scene recording do NOT include:

infrared analysis

which statement about notetaking is not true

note taking is done after all crime scene processing has been completed

The collection of standard reference samples at the crime scene is important because they:

permit comparisons to be made with the evidence

The conditions at a crime scene can be compromised by all of the following actions EXCEPT:

taking photographs at the crime scene

Primary crime scene

the location where the crime took place

The first responding officer must make attempts at the crime scene to obtain and question

witnesses and suspects (both a & c)

From the choices below, select the one correct physical evidence collection procedure

Bloodstained garments should be packaged separately in paper bags

Police barricades, and the strategic positioning of guards, will prohibit access to the crime scene for:

All unauthorized personnel

Secondary crime scene

An alternate location where additional evidence may be found. A location other than the primary crime scene, but that is in some way related to the crime, where evidence is found

Physical and chemical changes which occur following death:

Algor Mortis: temperature change Livor Mortis: color change Rigor Mortis: stiffening change

Three types of Photographs at a Crime Scene

Close-ups: (Zoomed in) focus on an injury, a weapon, or a piece of evidence to show detail Mid-range: Show spatial relationship and locations of items of evidence Overall: Show the scene as it is upon arrival

Crime scene sketches serve a unique purpose in permanently documenting the location of evidence:

Collected and removed from the crime scene

physical evidence of a hit-and-run scene should include

Glass fragments, fabric impressions, paint chips, fiber and tissues (all of the above)

The best way to guarantee that the evidence will withstand inquiries about what happened to it from the time of its finding to its presentation in court is to:

Properly record the crime scene, properly mark evidence for identification, Properly complete evidence submission forms. (All of the above)

Digital crime scene photographs require special measures to assure their admissibility in court due to:

The ability to manipulate the images

Physical evidence may be obtained from:

The crime scene, The victim, The suspect. (All of the above)

The manner of collecting and preserving physical evidence at a crime scene is determined by:

The nature of the evidence.

The crime scene notes must accurately record

descriptions of evidence present at the crime scene, the tasks assigned each investigator, personnel arrivals and departures from the scene (a, b, c)

a rough sketch need not include a

sketch of the suspects