When a homicide detective in California’s Central Valley last year reopened the investigation into the unsolved killing of a bakery owner, she turned to an increasingly popular forensic tool credited with helping solve hundreds of cases across the United States and Canada in recent years. The detective, Ashley Sanchez of the Kern County Sheriff’s Office, said she was confident she had evidence that could help identify a person whom she believes was involved in the gruesome 2010 death of Juanita