So where is the problem?
Well, first of all, it is illegal under federal law to sell a gun to someone who has been convicted of a crime involving domestic violence against a spouse or child. Kelley was accused by his former wife and son of domestic violence; furthermore, his ex-girlfriend describes him as an ‘outcast stalker’ and a ‘twisted individual.’
Kelley also spent a year in military detention before his bad-conduct discharge from the Air Force in 2014. So how did he get his Ruger AR rifle for the shooting?