One man is dead and another was arrested on suspicion of first-degree murder following a shooting at a mobile home park in north Boulder this morning, sheriff’s officials said.

Around 8:15 a.m., Boulder dispatchers received multiple reports of two shots being fired and a woman screaming at Ponderosa Mobile Home Park north of Broadway and Violet Avenue.

This evening, the Boulder County Sheriff’s Office identified the suspected shooter as Cody Nelson, 51, and announced he had been arrested and transported to the county jail for first-degree murder and prohibited use of a weapon.

Also arrested was Miriam L. Nayeh, 31, for accessory to murder in the first degree and domestic violence.

Boulder sheriff’s Cmdr. Heidi Prentup said that when deputies arrived, they found a 31-year-old man outside a trailer with multiple gunshot wounds and transported him to Boulder Community Health, where he was later pronounced dead.

The Boulder County Coroner’s Office identified the man as Andrew Duncan, 31, a transient in the Boulder area.

Around 8:50 a.m., deputies could be seen taking a man into custody at gunpoint. Prentup said that a man and a woman were inside a trailer that officials surrounded, and said the female was also being taken for questioning.

“We’re trying to figure out what happened,” Prentup said. “It’s still very preliminary.”

Officials have not yet said how the two men knew each other, but the neighbor, Zahira Romero, said Nelson and the victim were roommates.

Romero said she was inside her home just down the street when she heard the gunshots. She said her aunt lives right next to the trailer where the shooting took place and she called Romero.

“She said, ‘I need you to call the police, there are gunshots next door,'” Romero said. “I never would have thought anything like that would happen here.”

Romero said she used to live with her aunt and so she had talked with Nelson several times. She said he worked as a mover, and would sometimes ask her whether she wanted toys or other items he picked up while on jobs.

“He would just say, ‘Hi,'” Romero said. “He would just say what he needed to and leave. He wasn’t especially friendly.”

Romero said she did not know the name of the victim, just that he had been living with Nelson. She said she thought the woman involved in the case lived in a neighboring trailer.

A prosecutor with the Boulder County District Attorney’s Office was on scene, and the sheriff’s office will lead the investigation even though Boulder police personnel were also there.

Shining Mountain Waldorf School was placed on lockout, but that has since been lifted.

Residents in the area received a reverse 911 call to remain inside, but that order also has been lifted.

Mitchell Byars: 303-473-1329, byarsm@dailycamera.com or twitter.com/mitchellbyars.