Putting DNA to Work

How DNA Determines Guilt Or Innocence

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The science of identifying individuals using DNA sequences is very clear, and the probability of scientific error is extremely small. As a result, DNA evidence has been used to help identify perpetrators of crimes and to exonerate innocent people before they become suspects.

The following sections explain the science behind DNA fingerprinting in more detail.

How Can DNA Sequences Identify Individuals?
What Does a Match Mean?
Forensic DNA Evidence
DNA Identifier

Graphic of Suspects

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Catch A Criminal
A crime has been committed. Circumstantial evidence points to three men. Two of the men are brothers; the other man is unrelated. A trace ot the perpetrator's DNA has been found at the scene of the crime.

Find out how DNA can be used to catch a criminal.

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How Can DNA Sequences Identify Individuals? [ next ]