One of the three suspects accused of two murders this past October has pleaded guilty and will testify against the other two. According to CBS 5, Sean Angold will testify against his co-defendants, Morrison Lampley and Lila Alligood. Angold pleaded guilty to one count of second-degree murder.

As you surely remember, the three stand accused of killing and robbing a 23-year-old Canadian backpacker in Golden Gate Park before murdering a 67-year-old man in Marin two days later. They were later found and arrested near a Portland soup kitchen. At the time, they were discovered in possession of a car belonging to one of the victims, well-liked yoga instructor Steve Carter, as well as what is believed to be the murder weapon.

The backpacker, Audrey Carey, was apparently found tied up. "She wanted to travel," The Chronicle reports a relative of Carey's as saying at the time. "It was her first trip.”

Later, Haight Street neighbors and other local street folk said in a community meeting that that three drifters had been doing hard drugs around the Haight in the weeks before their spree, and "acting so edgy they even spooked the street folks."

In what is a new development in the case, KRON 4 reports that prosecutors are now saying they believe 23-year-old Lampley was the trigger man in both murders. He also stands accused of animal cruelty in the shooting of Carter's doberman, the dog he was walking at the time of his murder.

The three are all being prosecuted in Marin County, where prosecutors are not seeking the death penalty. If found guilty, Lampley and 19-year-old Alligood could be sentenced to life without parole.

Previously: No Death Penalty Sought In Case Of Alleged Drug-Addled Drifter Murderers