I believe the woman tried to identify the man to the police, apparently he was a sexual predator with a long history, but apparently they did not consider her theory as credible. Its almost like a grudge theory...For instance, A man falls in love with a woman, the man never gets the woman, however grows to resent her new relationship and the birth of their first child, etc, etc...because it should have been his. So he plays out his rage through victims, killing someone with the same first name, working somewhere named the persons middle name, that was her theory, that he played out his killings from her sister, her, her daughter, and i believe grand daughter.