Responsibilities of a Crime Scene Investigator

The job of a crime scene investigator isn’t glamorous or exotic as it’s portrayed on popular television shows.  It is extremely important and necessary for any criminal police investigation in order to find out who committed the crime and to bring the perpetrator(s) to justice.

In my novel Dead Game, Emily Stone tracks down serial killers and uses techniques of crime scene investigators in order to gather evidence anonymously for the police.  She uses procedures that many investigators use at homicide crime scenes and she is careful not to disturb potential evidence.  She takes identifying photos from various distances and searches potential crime scenes in a grid pattern.

In “real” life, there are many different law enforcement personnel to help the investigator to determine what happened and who committed the act.

What are the main objectives of a crime scene investigation?

1.                  Reconstruct the incident.

2.                  Determine the sequence of the events that led up to the incident.

3.                  Establish the mode of operation (MO) of the perpetrator(s).

4.                  Uncover the motive for the crime.

5.                  Find out everything the criminal(s) may have done at the crime scene.

6.                  Discover, if any, property that was stolen from the scene.

7.                  Recover and process all physical evidence at the scene.

The actual examination of the crime scene is a thorough and exhaustive effort for the investigator.  There are many things that must be considered and the best way to proceed.  Generally, the investigator must begin to reevaluate the sequence of events, being careful not to miss anything in the initial search.  A systematic survey of the scene including the immediate surroundings, both indoors and outdoors should be implemented.  Absolutely everything should be written down as it’s discovered, along with a detailed diagram of the scene, which should be clear, concise, and meticulous.

If at all possible, using two crime scene investigators to examination a crime scene is the best and most effective technique.  The team should work in a cooperative manner together, not on separate tasks.  Two people can cover much more than just one person.  A common technique is that one investigator discovers aspects and clues about the scene and reports it to the other investigator to write down.  When the search is completed, the two investigators begin again, this time switching positions.  This system can be quite effective in not missing any key piece of evidence that will assist in solving the crime.


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About jchasenovelist

Published thriller author, criminologist, and blogger.
This entry was posted in Forensic, Police and tagged . Bookmark the permalink.

2 Responses to Responsibilities of a Crime Scene Investigator

  1. Emily kazee says:

    I want to be a csi when I get older 🙂


  2. Pingback: Top 10 Favorite Blog Posts from Readers in 2013 | Author Jennifer Chase

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