Crime Scene Investigation

Season 4 Episode 23:

Bloodlines

A rape victim identifies her attacker from a line-up, after correctly giving the investigators his license plate number and physical description. While DNA is recovered, it indicates that the suspect is not guilty, as only 7 out of the 13 alleles matched. This suggests that the rapist is a relative. The suspect's brothers are all DNA-tested and none are a positive match. The resolution of this investigation is a shock to everyone due to the rarity of a genetic condition.

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