The jury, made up of six men and six women, deliberated for “several hours” before reaching the death sentence recommendation, the office said in a release.
Prosecutors depicted Gargiulo as a killer who charmed his female victims as a helpful neighbor and handyman before breaking into their homes and stabbing them to death, according to CNN affiliate KABC
One of the victims, Ashley Ellerin, was stabbed 47 times. She had planned to go with Ashton Kutcher to a Grammy Awards after-party on the night she was killed in her home in 2001. Kutcher testified at the trial
A second murder victim, Mario Bruno, a neighbor of Gargiulo’s, was killed and mutilated in December 2005.
In 2008, Gargiulo attacked and stabbed Michelle Murphy, who survived. He accidentally cut himself in the attack, allowing investigators to link his DNA to the other killings, KABC reported.
Gargiulo’s sentencing is scheduled for February 28, the DA’s office said. The judge will have the final decision.
He has also been charged in a 1993 slaying in the Chicago area, the DA’s office said. Prosecutors claim that victim, Tricia Pacaccio, was Gargiulo’s first. He was 17 at the time.
CNN has reached out to Gargiulo’s attorney, but hasn’t yet had a response.