Tacoma police arrested a man about 6 p.m. Wednesday on suspicion of second-degree murder and first-degree assault after a transient was found dead early Tuesday, police said.
The suspect was booked into Pierce County Jail.
Police spokeswoman Loretta Cool said officers were called to the 3100 block of South 23rd Street about 10:25 a.m. Tuesday.
The man had been dead for some time, Cool said.
The man, later identified as Dustin Kopp, 32, died of a gunshot wound to the chest, according to Pierce County medical examiners.