Transcript for New Video Shows Oklahoma Volunteer Cop Holding Gun, Taser Over Suspect
All right, David, new developments in the case of an Oklahoma reserve deputy accused of shooting and killing a suspect. This morning, newly released video showing him holding a taser and a gun over a suspect days before that deadly shooting. ABC's Clayton Sandell has that story. Oh, I shot him. I'm sorry. Reporter: 74-year-old now former volunteer sheriff's deputy Robert bates was charged with shooting and killing Eric Harris in April last year, bates heard in this video saying he thought he pulled out his taser but instead grabbed his gun by mistake. He shot me. He shot me. Reporter: But this morning new video obtained by the frontier news apparently showing bates three weeks before that fatal shooting standing watch over a moaning suspect that police had just handcuffed with his taser drawn? What are you moaning about? What's hurting? Stop, stop. Reporter: Watch closely though difficult to make out bates then appears to also draw his gun, that's his taser, that's the gun. The deputy wearing the body cam tells him to stop. Stop, stop. Reporter: Police say that command was simply so the deputy could hear what was happening inside the house and while bates did not harm this suspect, the attorney for Harris' family says the new video reveals a pattern showing bates was eager to use his weapon. It's not a rapidly evolving situation like they tried to describe with the Eric Harris shooting. Here's a situation where this individual has already been detained but yet Mr. Bates feels it necessary to draw all kinds of weapons in a situation that does not call for it. Reporter: The attorney says bates was too cozy with the now former sheriff and lacked the required training to be on the street alongside sworn cops. Bates has pleaded not guilty to second degree manslaughter. His trial begins later this month. For "Good morning America," Clayton Sandell, ABC news, Denver.
This transcript has been automatically generated and may not be 100% accurate.