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Commonwealth of Virginia v Keith Sampson
DNA mixture evidence puts armed robber behind bars
| Crime | On January 21, 2011 an armed man robbed a Family Dollar in the Chesapeake, Virginia area. |
| Evidence | While fleeing the scene, the robber left behind a gray jacket, which was taken as evidence. |
| DNA | The Virginia Department of Forensic Science developed DNA mixture data from the jacket. |
| Match | Due to the complexity of the three-person mixture, the lab's manual analysis could not produce a match statistic. |
| TrueAllele | On the same DNA data, the computer found that Keith Sampson matched the jacket with a match statistic of 414 billion. |
| Cybergenetics | On February 28, 2012, Dr. Mark Perlin testified at the City of Chesapeake trial about the computer’s DNA match statistic. |
| Outcome | On March 1, 2012, the jury found Mr. Sampson guilty of all charges. He was sentenced to 26 years in prison. |
Media
- Cybergenetics TrueAllele DNA mixture analysis helps convict Virginia man of armed robbery Cybergenetics Newsroom