Police arrested 19-year-old Dustin Michael Trowbridge early Thursday morning.
According to investigators, the teen shot and killed his aunt around midnight after an argument in her home.
They say he then stole a car and fled the scene, but officers managed to track him down a short while later.
Police say Trowbridge had been living on and off with his aunt, 25-year-old Rita Anderson and her family.
According to a police report, Anderson's boyfriend and her two young children were in the home at the time of the shooting.
Trowbridge is now in the Sebastian County Jail on no bond.