Police swabbed the driver’s side handle of Joseph James DeAngelo’s car, according to arrest and search warrants released Friday.

Authorities sent it for testing and matched it to semen recovered at some of the Golden State Killer’s crime scenes, the arrest warrant said…

On April 23, a day before his arrest, police say they collected multiple samples from a trash can outside DeAngelo’s home in Citrus Heights, a town 16 miles northeast of Sacramento. They had watched the home for three days, the warrant said.

Only one item inside the trash — a piece of tissue — provided enough DNA to run a test. Police matched it to evidence from the crime scenes, the documents said.