In 1985, in England, Alec Jeffreys, discovered each human has unique DNA, with the exception of identical twins. DNA is found in white blood cells; blood, skin, saliva, semen, and hair follicles. In 1992, after the National Research Council said that DNA testing was a reliable method to identify criminal suspects, the technology rapidly entered the mainstream court system. Dolan DNA Learning Center
What Every Law Enforcement Officer Should Know About DNA Evidence -- Investigators with fundamental knowledge of how to identify, preserve and collect DNA evidence properly can solve cases in ways previously seen only on television.
Interpol Forensics -- Forensic expertise and the exchange of forensic data is vital to international investigations.
The case for innocence -- DNA can establish with near certainty who did or didn't commit a crime. Why, then, do inmates remain in prison despite DNA evidence which exonerates them?
What Jennifer Saw: An examination of false eyewitness identification in crimes and how DNA evidence is setting the innocent free.
December 2000, after 14 years on Florida's death row, Frank Lee Smith was cleared of the rape and murder of Shandra Whitehead, 8 years old, as a result of DNA testing unavailable when he was convicted. Ten months before he was proven innocent, he died of cancer in prison, steps away from Florida's electric chair.
The truth is that polygraphs lie -- The Ford Heights Four, as they became known, were convicted for brutal slayings, and two defendants were sentenced to death. But in 1996, DNA evidence exonerated all four. They had spent 18 years behind bars, partly because the lie detector lied.