Joseph James DeAngelo Jr., a former police officer, faces 13 rape-related charges and 13 murder counts stemming from crimes in the 1970s and 1980s across six counties in California. He is expected to enter a guilty plea during a hearing Monday.
An accused serial killer, known as the "Golden State Killer", is expected to plead guilty Monday in person, in a university ballroom.
The charges linked to rapes were filed as kidnappings to commit robberies because the statute of limitations for sexual assaults has expired.
Two counts of murder in the February 2, 1978, shootings of Kate Maggoire, 20, and Brian Maggoire, 21, as they walked their dog in their Rancho Cordova neighborhood.
Nine counts of kidnapping to commit robbery using a gun and knife between September 4, 1976, and October 21, 1977, with the victims identified as Jane Does numbers 1-9. "It's just such a loss".
Their father found the couple two days later. "My dad was never the same".
But it wasn't until years later that investigators connected a series of assaults in central and Northern California to later slayings in Southern California and settled on the umbrella Golden State Killer nickname for the mysterious assailant whose crimes spanned 11 counties from 1974 through mid-1986.
The crimes associated with the "Golden State Killer" were chronicled in the book "I'll Be Gone in the Dark", written by Michelle McNamara.
The killer racked up a series of monikers for his crimes over the decades.
It was only the pioneering use of new DNA techniques that two years ago led investigators to DeAngelo, who was sacked from the Auburn Police Department northeast of Sacramento in 1979 after he was caught shoplifting dog repellent and a hammer. They eventually narrowed in on DeAngelo with a process that has since been used in other cases nationwide, but said they confirmed the link only after surreptitiously collecting his DNA from his auto door and a discarded tissue.
"We have a moral and ethical responsibility to consider any offer from the defense, given the massive scope of the case, the advanced age of numerous victims and witnesses, and our inherent obligations to the victims", said a joint statement from prosecutors last week. Defense attorneys would not elaborate on the statement.
"Death doesn't solve anything".
She was so committed to seeing the case through that she temporarily moved from Santa Cruz to her adult daughter's Sacramento home, where she has slept on an air mattress in a spare bedroom.
Harrington supports the death penalty, but also agreed with prosecutors' decision "just to give some degree of closure". "We've dealt with the effects of the attack for 42 years".