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Probative Value and Prioritization

DNA for Law Enforcement8

DNA is described as the “blueprint of life” because every normal nucleated cell in an individual’s body is identical, like a blueprint for a manufactured item. The body creates, or “manufactures”, cells based on a single blueprint.

DNA double-helix with half from monther and half from father.

Basic DNA facts that all law enforcement personnel should understand are listed below:

To make sound investigative, evidence collection and prioritization decisions, team members including first responders, investigators and medical personnel should have a basic understanding of DNA and how DNA evidence is analyzed. There are multiple online and instructor-led DNA training programs targeted to law enforcement and other first responder personnel. Law enforcement personnel are strongly encouraged to take advantage of these important training resources.9,10

8 The President’s DNA Initiative: Online Training for Officers and Investigators »
9 Illinois State Police Crime Scene Investigator Training »
10 Bureau of Justice Assistance Law Enforcement Training Database »


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