The incident took place Friday outside a convenience store in Jacksonville, where Davis and four of his friends were hanging out inside a parked SVU.
Lt. Rob Schoonover of the Jacksonville Sheriff's Department said 45-year-old Michael David Dunn and his girlfriend, both in town for Dunn's son's wedding, pulled up and asked the teens to turn down the music in their car.
Investigators reported that words were exchanged between Davis and Dunn, but did not elaborate.
None of the vehicle's other occupants were injured.
Dunn's girlfriend, who was in the store buying wine at the time, returned to the car having heard a "popping" sound, and the two bolted from the scene. The unnamed woman told investigators Dunn admitted he "fired at these kids," but claims they were not aware someone had died until hearing it on the news.
Dunn, a Satellite Beach resident, was arrested Saturday at his home on charges of murder and attempted murder. He was booked into Brevard County jail, where he is being held without bail.
He is expected to be returned to Jacksonville shortly after pleading not guilty through his attorney Robin Lemonidis.