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Crime Scene Unit
Overview
The Council Bluffs Police Crime Scene Unit is comprised of three civilians responsible for the preservation, documentation, and collection of evidence at crime scenes. This includes using photography and videography and other equipment to document the scene. Some evidence is large and obvious while other evidence can be invisible to the naked eye.


Locating Evidence
The use of a forensic light source is one way to enhance possible trace evidence. Other ways to locate evidence is the use of fingerprint powders, dye stains, and chemical applications. Fingerprints, hair, shoe prints, blood, and saliva are all examples of physical evidence at a scene. After evidence has been located and documented, it is collected using specific techniques for each item.

Fingerprint  Shoe print 


Other Responsibilities
Other responsibilities include in-lab drug testing, fingerprinting, fingerprint comparisons, photography, attending autopsies to document and collect possible evidence, as well as submitting evidence to the Division of Criminal Investigation Crime Scene Unit Lab for further testing and comparisons.


Automated Fingerprint Identification System
In April 2007, the crime lab technicians began searching finger and palm prints using AFIS Technology. AFIS is an acronym for Automated Fingerprint Identification System. A "hit" occurs when a print lifted from a scene matches one in the AFIS database.

The Iowa Department of Public Safety maintains and operates the Automated Fingerprint Identification Systems (AFIS). Council Bluffs Police department operates the AFIS remote workstation for Southwest Iowa.

The following are examples a finger and palm print identification: 

Palm print matches  Fingerprint matches

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