CALDWELL — Prosecutors also plan to drop a lewd conduct charge against Christopher "Mikey" Duran as part of the deal.
Duran was one of three people charged in connection with last August's shooting death of James Groat in an isolated area near Lake Lowell, near Nampa. His plea follows this month's trial of Gregory Higgins Jr., whom a jury found guilty of first-degree murder and of using a deadly weapon in the crime.
Duran pleaded guilty Tuesday to aiding and abetting second-degree murder, admitting that he helped Higgins lure the victim to the remote site last August, knowing that Groat would die there.
"I had knowledge of the plan," he told a judge at the hearing. "I had a handgun with me at the time, and I handed it to Higgins."
Prosecutors said that Duran borrowed the murder weapon from Groat. The men believed the victim was a police informant, and Higgins forced him to dig a grave before shooting him once in the head and four times in the body.
Duran was originally charged with first-degree murder as well, but reached a deal with prosecutors to lessen his charge in return for testifying against Higgins. His sentencing for aiding and abetting second-degree murder will be on Oct. 3.
He faces a minimum of 10 years in prison, and could face up to life. However, prosecutors are expected to take his cooperation into account in their sentencing recommendations.
The lewd conduct case was unrelated to the murder. But defense attorneys brought it up during Higgins' trial, arguing that Duran intended to kill Groat because Groat planned to report Duran's sexual relationship with a 15-year-old girl.
Trials for both of Duran's cases had been set to begin this week.