When 36-year-old computer programmer Lisa Valdez was found dead inside her upscale San Francisco apartment, the police immediately suspected she was killed by someone she knew. But even after the police collected DNA samples from all of her male friends and family members, they were no closer to making an arrest, and the case eventually…

The brutal murder of a 94-year-old woman inside her home completely shocked a California community for years. The police were left without many answers as to who could be responsible for such a terrible crime until they found the clue they needed in the form of DNA. Photo Source: FOX News Episode Sources: SF Chronicle …

In 1992, 24-year-old Lisa Ziegert was kidnapped from the gift shop where she worked in the sleepy town of Agawam, Massachusetts. Over the next several years, law enforcement worked tirelessly to identify and capture her attacker. Can important forensic evidence eventually lead investigators to their suspect? Photo Source: Unsolved Mysteries Wiki Episode Sources: Chilling Crimes…

Marcellus Williams was charged and convicted of murdering a St. Louis woman inside her home in August 1998. Despite zero forensic evidence linking him to the brutal murder, he sits on death row today. Is Marcellus Williams a cold-blooded killer? Or another wrongfully accused man like he and his attorneys claim? Photo Source: Innocence Project…