robert charles was being restrained by one of the undercover police officers when bates , who was monitoring from afar , ran up ` trying to get the situation under control ' and fired one shot .
police at the scene in tulsa , oklahoma , bates , a former full-time officer , accidentally pulled out his service weapon instead of the stun gun .
but is it accredited to his age ? or was it accredited to the rapidly evolving situation ? i guess that will be determined in investigation .