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What does the first officer do after assess the crime scene, assisting the injured, detain the witness(es) and arrest the perpetrator?
Protect the scene and take notes
What needs to happen to evidence that isn’t compromised?
What is the difference between primary and secondary scene?
primary: original location
secondary: an alternate location
evidence that is collected and the scene AND what it does
May prove that a crime was committed
Gives the detectives leads to work within the case
Link a suspect/victim with a crime scene
Establish the identity of a victim/suspect
Corroborate verbal witness testimony
Exonerating the innocent
Where is the physical evidence obtained?
3 types of evidence
Testimonial: oral or written statements
Physical: any material items present at the scene, on the victim, or in a suspect’s possession
Trace: physical evidence that is found in small but measurable amounts
the CAD program
The computer-aided drafting program is used to create finished sketch
What must an evidence collector do to avoid contamination?
Videotapes of a crime scene must include what?
narrator, be objective, record from different perspectives, and body-worn cameras
detain physical evidence
What does rough sketches include/ not include?
Date, time, and location
Scale
Recovered items
Important features
Accurate distance measurements of objects
A legend for description of items
A compass designating North
Names of investigators, victims, and suspects
Not include
Collection of evidence involves extreme care in______, _______, and_____ in each piece of evidence
Identifying, packaging, and labeling
when there is a body, what should the photographer do?
must show body’s position and location
Databases(what they do and acronym)
Automated Fingerprint Identification System (AFIS)- fingerprint identification used when you get a background check(goes into the system)
Integrated Automated Fingerprint Identification System (IAFIS)- same as AFIS, but they also have records(criminal) that go into the system
Combined DNA Index System (CODIS)- any DNA that is found at the crime scene goes into this system
Integrated Ballistics Identification System (IBIS)- identification of bullets
International Forensic Automotive Paint Data Query (PDQ)- where you can find any vehicle type, model, and year by the paint found on the body/crime scene
4 steps of crime scene protocol
Interview, examine, document and process
What is the purpose of crime scene research?
know what collecting possible carriers of trace evidence is
3 categories of attacks on labs
tampering, contamination, substitution
Calls from the public call the police to be outfitted with what?
Body cams
define physical evidence
Any object that can establish that a crime has been committed or link a crime and a victim/suspect
