Joseph James DeAngelo is an American former police officer who gained notoriety as the Golden State Killer. He was responsible for a series of crimes, including at least 13 murders and over 50 rapes, primarily in California during the 1970s and 1980s. His criminal activities spanned several counties, creating widespread fear and uncertainty in the communities affected. In April 2018, DeAngelo was arrested after DNA evidence linked him to the crimes. In June 2020, he pleaded guilty to multiple charges, including murder and kidnapping. His case has been significant in discussions about forensic science and the use of DNA in solving cold cases.