I was watching a case on ID, where this women daughter`s was brutally killed and raped, and semen was found on her body. Criminal records of DNA was not found on the body , but she asked to check the Ancestry .com and found a match. But they don't know what relatives of these persons did the killing, this so neat in solving some of these cases. This Mother had a goal and not only to exonerated the person that was found guilty, she is still perusing the case of who really killed her daughter.