A jury has convicted a Southern California man of murdering four women and a 12-year-old girl in the late 1970s.

Jurors took less than two days to reach guilty verdicts Thursday against Rodney Alcala after six weeks of testimony in Santa Ana. He could face the death penalty.

The 66-year-old Alcala, who acted as his own lawyer, had previously been sentenced to death twice for the murder of 12-year-old Robin Samsoe of Orange County, but both convictions were overturned.

Prosecutors added the murders of four women in 2006 after investigators discovered DNA and other forensic evidence linking him to those cases.