âThe trial conclusively established that no other individual â not even Kelleyâs own parents or partners â knew as much as the United States about the violence that Devin Kelley had threatened to commit and was capable of committing,â Mr Rodriguez wrote. Kelley had served nearly five years in the Air Force before being discharged in 2014 for bad conduct, after he was convicted of assaulting a former wife and stepson, cracking the childâs skull. The Air Force has publicly acknowledged that the felony conviction for domestic violence, had it been put into the FBI database, could have prevented Kelley from buying guns from licensed firearms dealers, and also from possessing body armour.