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Tonight's episode of 20/20 involves touch DNA, in case anyone is interested. A man was murdered, and his wallet stolen. Police swabbed the victim's pocket, because they figured the killer would have reached in there to remove it.
All they had to go on at the time was a white Ford Focus, which was seen driving suspiciously around the time of the murder. They chased down those cars, but to no avail. Eventually they got a CODIS hit on the DNA, and further research indicated that the contributor was involved in a traffic stop a couple weeks after the murders. That car was also a white Ford Focus (he was the passenger).
Things snowballed from there...
What does that case sound like? White car spotted near the scene of a murder. Touch DNA on an item the killer had to touch...
ETA: In that one, the odds of the DNA matching anyone other than the suspect was 1 in 270 quadrillion. In this case, we're talking about 5 quintillion. A quintillion, is a billion times larger.
Testing has come a long way in the past 15 years.
All they had to go on at the time was a white Ford Focus, which was seen driving suspiciously around the time of the murder. They chased down those cars, but to no avail. Eventually they got a CODIS hit on the DNA, and further research indicated that the contributor was involved in a traffic stop a couple weeks after the murders. That car was also a white Ford Focus (he was the passenger).
Things snowballed from there...
What does that case sound like? White car spotted near the scene of a murder. Touch DNA on an item the killer had to touch...
ETA: In that one, the odds of the DNA matching anyone other than the suspect was 1 in 270 quadrillion. In this case, we're talking about 5 quintillion. A quintillion, is a billion times larger.
Testing has come a long way in the past 15 years.
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