DNA on chewing gum leads to conviction in 1980 cold case

Robert Plympton, 60, was found guilty last week of murdering student Barbara Tucker in 1980 after sexually assaulting her. They caught him by using genetic tests on DNA from the crime scene, narrowing down suspects based on presumed traits ('there was extremely high likelihood that the person who murdered and raped Barbara had red hair') and getting DNA samples from them. — Read the rest
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