NORTH LAS VEGAS - Police have at least three suspects in custody in connection with the murder of Trevor Nettleton: an off-duty Metro officer who was killed just after midnight Thursday near Donna & Emerald.  The mug shots for Prentice Marshall and Saul Williams were released before noon on Friday.  Marshall is now out of the hospital and in jail.

The third suspect is a 17-year-old male.  Because of his age, his identity has not been released, but he will be tried as an adult.

Officer Trevor Nettleton who had been with the force for 3 years, was working in his garage when an unknown number of subjects broke in.

Police say gunfire was exchanged, and that's when Officer Nettleton was killed. One of the suspects, an 18 year old Prentice Marshall, was hit by gunfire. He was taken to UMC with non - life threatening injuries and was later arrested and booked. Marshall is North Las Vegas resident who has a criminal history for carrying a concealed weapon, contributing to the delinquency of a minor, obstructing a police officer, possession of stolen property and trespassing.

Another suspect 20 year old Saul Williams Jr., who is also a North Las Vegas resident, was arrested and booked on a charge of murder with a deadly weapon. Williams has a juvenile record and pictures of him on MySpace show him gesturing gang signs.

Investigators say it is an isolated incident, unrelated to his police work. Officer Nettleton leaves behind a wife, and two young children. His mother was also in town for the Thanksgiving holiday. He was born in Quincy, Washington and raised in Yakima, Washington.

After high school Nettleton joined the Marine Corps. He served in the Marines for 9 1/2 years. He had a distinguished career and was part of the Presidential Guard under George W. Bush.

Officer Nettleton was one of five officers who were commended by Metro two years ago for saving lives at a fire at the Century Meadows apartment complex, including two young children and an elderly man.

The Injured Police Officers Fund has established an account for Officer Nettleton at Nevada State Bank.

Stay with Action News as we continue to follow this developing story