Perry Spight, 27, died after being shot in the lower back with a small-caliber handgun about 1:50 a.m., Salt Lake County sheriff's Sgt. Paul Jaroscak said. The shooting occurred at the Stonehedge Apartments, 450 E. 4180 South.
After canvassing the Salt Lake Valley, detectives arrested Edgar Jose Montero, 18, on suspicion of murder and booked him into the Salt Lake County Jail.
Spight was with six to 10 people near the bottom of an apartment staircase when two shots were fired during an argument. Spight, who was hit once, ran back into apartment No. 8, where he collapsed on the carpet and died, Jaroscak said.
The outside argument escalated after a partygoer called police and complained that someone at the apartment wouldn't leave. Jaroscak said the emergency dispatcher heard a verbal argument in the background while talking with the partygoer and then heard what she thought were gun shots.
Sheriff's deputies, including members of the metro gang unit, responded to the call. Although investigators believe Montero is a gang member, they haven't determined whether the shooting is gang-related, Jaroscak said.
It is not known whether Spight or one of his relatives lived at the apartment. After the shooting, several people left the complex. The gun was not recovered, Jaroscak said.