Justin Mark Eilers, 30, of Boise, the man shot and killed near Nampa Christmas night, was a champion professional mixed martial arts fighter. James Robert Malec, 48, charged with second degree murder in the incident, formerly worked as a Canyon County Sheriff Office jailer.

Malec is accused of shooting Eilers after an argument at the home of Malec and his girlfriend or wife, Eilers' mother, police said.

Eilers died of a single gunshot wound to the chest, county coroner Vicki DeGeus-Morris said. The coroner's office identified the death as a homicide.

Malec was booked into the Canyon County  jail late Thursday on the murder charge and arraigned today.

Law enforcement officials became aware of the incident Thursday night when the sheriff's office responded to a domestic disturbance in the 4600 block of South Happy Valley Road near Nampa at 10:44 p.m. The call was upgraded to a response to a shot fired.

When deputies arrived on the scene, Eilers had been shot and Malec was taken into custody. Emergency response workers could not revive the gun shot victim.

"They ended up having a verbal altercation," Canyon County Sheriff Chris Smith said. "It was just a personal thing." Smith said alcohol was involved in the incident.

The Press-Tribune will provide more details as they become available.