Roy Charles Waller
Roy Charles "Porky" Waller is an American serial rapist. He lived in the Bay Area and for 26 years was employed as a safety engineer in the Environment, Health and Safety Office at the University of California at Berkeley. He was arrested in September 2018 as a suspect in a series of more than ten rapes and kidnappings committed between 1991 and 2006 in six Northern California counties. DNA evidence from crime scenes were matched on the online DNA-matching service, GEDmatch, to a relative of Waller, and he was identified through genetics-based genealogy.
Police constructed a family tree and, using the known elements of the rapist, narrowed the suspects down to Waller. After the GEDmatch confirmation, they took about a week to identify and arrest the suspect. He was charged with dozens of counts of rape, which took place in five different counties, including Sonoma, Solano, Contra Costa, Yolo and Butte. At the time of his arrest he was living in Benicia, was married, and was employed as a safety specialist at the University of California Berkeley. He had worked there for 26 years. He was convicted of 46 counts in November 2020.
The same genetic genealogy technique had been used in the identification and arrest of the suspect known as the Golden State Killer.