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.
Basic DNA facts that all law enforcement personnel should understand are listed below:
- DNA is inherited; we receive half from each parent
- Identical twins have the same DNA profile
- An individual’s DNA profile stays the same for their entire life
- An individual’s DNA profile is the same in every nucleated cell
- DNA remains stable under dry conditions
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 »