Billings police said they arrested a 53-year-old man Thursday on suspicion of the deliberate homicide of a 58-year-old man killed Monday in his vehicle on 15th Street West.
Michael Sims was booked into Yellowstone County jail.
He is a suspect in the death of Randall Robert Livingston, who was found dead with a gunshot wound in his neck in his vehicle near the intersection of 15th Street West and Wyoming Avenue.
Sims has not appeared in court.
