An anonymous reader calls our attention to California's familial searching policy, which looks for genetic ties between culprits and kin. The technique has come to the fore in the last few years, after a Colorado prosecutor pushed the FBI to relax its rules on cross-state searches. "Los Angeles Police Department investigators want to search the state's DNA database again — not for exact matches but for any profiles similar enough to belong to a parent or sibling. The hope is that one of those family members might lead detectives to the killer. This strategy, pioneered in Britain, is poised to become an important crime-fighting tool in the United States. The Los Angeles case will mark the first major use of California's newly approved familial searching policy, the most far-reaching in the nation."