DNA Evidence – LE Information
As you know, the Forensics Unit reminded users that they should be submitting “rape kits” whenever collected, not just when agencies had a potential suspect. This allows the evidence collected to be searched against the CODIS. The FBI Laboratory’s Combined DNA Index System (CODIS) blends forensic science and computer technology into an effective tool for solving crime.
In response to that notice, we have learned that several agencies have not submitted other qualifying evidence, due to this misconception that you must have a potential suspect before a submission. Simply put, that is not the case. For instance, a detective asked us if they could submit a cigarette butt discarded by a bank robber. Certainly, that could potentially match an offender on file, or later match evidence submitted by another jurisdiction. That could provide links for investigators to explore!
In the following, we alert you to some important growing useful opportunities in crime fighting by officers that collect and submit DNA evidence.
The purpose of the study was to determine whether it was cost effective to use DNA in the investigation of ordinary property crimes.
• Twice as many property crime suspects were identified and arrested when DNA evidence was collected.
• In cases where both fingerprint and biological evidence were collected, more suspects were identified via the FBI’s Combined DNA Index System (CODIS) than were identified via the FBI’s Automated Fingerprint Identification (AFIS) system. DNA arrestees had double the number of prior arrests and double the prior convictions as those arrested through traditional investigations. More than twice as many cases were accepted for prosecution when DNA evidence was processed than when it was not. (in addition to fingerprint evidence) compared to a traditional property crime investigation.
For a summary of additional findings, please visit:
http://www.ojp.usdoj.gov/nij/topics/forensics/dna/property-crime/welcome.htm
Free online training:
http://dna.gov/training/letraining/
