LOS ANGELES (AP) — An air conditioning repairman pleaded not guilty Thursday to the stabbing deaths of two women, including a former girlfriend of actor Ashton Kutcher.

Michael Thomas Gargiulo, 32, of Santa Monica faces two counts of murder and two counts of burglary in connection with the killings of 22-year-old Ashley Ellerin, Kutcher's former girlfriend, and Maria Bruno in Monterey Park, prosecutors said.

Ellerin who was found dead in February 2001 in her Hollywood Hills home. Bruno was fatally stabbed in 2005.

No decision has been made on whether to seek the death penalty, said Jane Robison, a spokeswoman for the district attorney's office.

Gargiulo was arrested in July and is being held in lieu of $1.1 million bail in connection with an April 28 knife attack on a Santa Monica woman. He is facing attempted murder and burglary charges in that case.

Police said DNA evidence collected from that crime scene helped link Gargiulo to the two killings.

Kutcher, who is married to actress Demi Moore, told police he went to pick up the fashion student-model for a post-Grammy Awards party, but she didn't answer the door. Her body was discovered the next day by a friend.