The filing notes Robinson confessed to killing Kirk to several people, including his roommate and friends, with DNA testing, surveillance video and eyewitness testimony backing up the remaining elements of the charges.

Prosecutors also allege Robinson tried to obstruct the investigation by hiding the rifle in bushes, discarding clothing he wore during the shooting, and later trying to recover the weapon, and that he told his roommate, Lance Twiggs, to delete incriminating texts and avoid investigators.