Jones was accused this year of drug possession and auto burglary. The information came from law enforcement sources.
Police Chief Danny Ford earlier identified Jones as the teen who said the victim was targeted because the three were bored.
Court records filed Thursday reveal Jones spoke to a police detective at length Aug. 18, two days after his arrest.
“During this interview, Jones advised that Luna was the shooter and that Luna was in the back seat of the vehicle and that James Edwards Jr. was seated in the front passenger seat of the vehicle that Jones advised that he was operating,” the district attorney's chief investigator, Justin Scott, wrote in requests for search warrants.
“Jones described the events that led up to the point later in the evening when law enforcement officers made contact with Jones, Edwards and Luna and took them into custody,” Scott wrote.
Investigators copied information from Jones' cellphone, Luna's cellphone and from a cellphone and laptop computer found in Edwards' backpack, court records show.
Investigators were unable to get data from another of Edwards' cellphones because “a factory reset had been performed on the device.”
Investigators were particularly interested in text messages on the cellphones because of what Edwards told an Oklahoma juvenile affairs worker about 30 minutes after the killing. Edwards had been dropped off at the courthouse and met with the worker.
The worker remembered Edwards stated “there was a shooting and that he was getting text messages from people asking if he done it,” court records show.
The victim had come to Oklahoma to play college baseball. He was a student at East Central University in Ada. He was in Duncan visiting his girlfriend.