"Everywhere that Mr. Gargiulo went, death and destruction followed him," Los Angeles Superior Court Judge Larry P. Fidler said while handing down the sentence, calling the attacks "completely vicious and frightening."
Also known as "The Boy Next Door Killer", Gargiulo was said to live close to his victims, acting as a friendly neighbor before breaking into their homes and stabbing them to death, according to prosecutors.
One of the victims was 22-year-old Ashley Ellerin, a fashion design student who was murdered in 2001 hours before she was to go on a date with actor Ashton Kutcher. Gargiulo was also found guilty of murdering Maria Bruno, 32, and the 2008 attempted murder of 26-year-old Michelle Murphy, who testified against Gargiulo.
Kutcher also testified during the 2019 hearing, saying he was two hours late picking up Ellerin for their date, which they had planned after meeting a week before.
"I knocked on the door and there was no answer," Kutcher said. "I knocked again, and once again, no answer. At this point, I pretty well assumed she had left for the night, and that I was late, and she was upset."
The actor went on to say he had peeked through the windows and saw what he believed to be wine spills on the floor.
"We believe now the evidence will show that was actually blood, and Ashley had already been murdered," Deputy District Attorney Dan Akemon told the jury at the trial, per court documents.