PRIVACY: The Golden State Killer Is Tracked Through a Thicket of DNA, and Experts Shudder. “Even as scientific experts applauded this week’s arrest of the Golden State Killer suspect, Joseph James DeAngelo, 72, some expressed unease on Friday at reports that detectives in California had used a public genealogy database to identify him. Privacy and ethical issues glossed over in the public’s rush to embrace DNA databases are now glaringly apparent, they said.”