Police officer in Tulsa County , Oklahoma , shot Donald Allen on April 11 . Brian Barnett , 25 , killed Allen , 66 , after man made threatening statements . Bodycam footage showed Allen advancing with loaded , 22-caliber pistol . Tulsa County Police Department turned findings over to Sand Springs DA . Video was released after being recovered from a malfunctioning camera .
Police officer in Sand Springs , Oklahoma , shot Donald Allen on April 11 . Brian Barnett , 25 , killed Allen , 66 , after man made threatening statements . Bodycam footage showed Allen advancing with loaded , 22-caliber pistol . Sand Springs Police Department turned findings over to Tulsa County DA . Video was released after being recovered from a malfunctioning camera .