Crime scene investigators document the crime scene. They take photographs and physical measurements of the scene, identify and collect forensic evidence, and maintain the proper chain of custody of that evidence.
Who is responsible for documenting the crime scene in detail and collecting physical evidence?
5. Document and process the scene – With a plan in place, the crime scene team conducts a thorough, coordinated investigation of the scene, collecting all probative evidence.
Who collects traced evidence?
Trace examiners use tools such as tweezers, tape, specialized vacuums, swabs, alternate light sources, and lasers to find and collect trace evidence. Following the principles of proper crime scene investigation, the collected materials are packaged, documented and sent to a crime laboratory for analysis.
Who is called in if the evidence requires expert analysis?
SPECIALISTS (forensic entomologists, anthropologists, or psychologists) may be called in if the evidence requires expert analysis. DETECTIVES interview witnesses and consult with the CSI unit. They investigate the crime by following leads provided by witnesses and physical evidence.
What are the four patterns of evidence?
Common search patterns include the spiral, strip/line, grid, zone/quadrant, and pie/ wheel.
What are the four main types of documentation at a crime scene?
The categories are summary, scene (including a detailed body description if in a death investigation), processing, evidence collected, and pending.
What are the 7 basic steps in crime scene investigation?
7 Steps of a Crime Scene Investigation
- Identify Scene Dimensions. Locate the focal point of the scene. …
- Establish Security. Tape around the perimeter. …
- Create a Plan & Communicate. Determine the type of crime that occurred. …
- Conduct Primary Survey. …
- Document and Process Scene. …
- Conduct Secondary Survey. …
- Record and Preserve Evidence.
What are the three phases of criminal investigation?
Applied to the criminal realm, a criminal investigation refers to the process of collecting information (or evidence) about a crime in order to: (1) determine if a crime has been committed; (2) identify the perpetrator; (3) apprehend the perpetrator; and (4) provide evidence to support a conviction in court.
What are the 5 steps in processing a crime scene?
INTERVIEW, EXAMINE, PHOTOGRAPH, SKETCH and PROCESS.
What are the five major types of trace evidence?
Common examples would be hair, fiber, paint chips, body fluids, stains, powders, explosive and gunshot residues, glass particles, vegetative matter, metal particles, soil, and even odors. Occasionally, even large objects will wind up in the trace evidence lab.
What type of evidence should be collected first?
Collecting prints at the crime scene should be every investigator’s top priority. Fingerprints from the suspect as well as elimination fingerprints from the victim will also be needed for comparison (the same holds true for palm and bare footprints).
What type of evidence does FBI consider most valuable?
Answer Expert Verified
The answer is DNA. There are several ways to obtain DNA samples, like blood, saliva, semen or hair. They are very important to guarantee a certified verification of the people involved with the situation and guarantee the best investigation possible of the event.
What are the 7 types of evidence?
Terms in this set (7)
- Personal Experience. To use an event that happened in your life to explain or support a claim.
- Statistics/Research/Known Facts. To use accurate data to support your claim.
- Allusions. …
- Examples. …
- Authority. …
- Analogy. …
- Hypothetical Situations.
What is the strongest type of evidence?
The most powerful type of evidence, direct evidence requires no inference. The evidence alone is the proof.
What are the 2 main types of evidence?
There are two types of evidence; namely, direct evidence and circumstantial evidence.