In this Friday, April 10, 2015, photo, Tulsa County Sheriff's Office Capt. Billy McKelvey, left, speaks next to Jim Clark, an independent consultant, during a press conference about the investigation of the death of Eric Harris in Tulsa, Okla. Police say a reserve sheriff's deputy thought he was holding a stun gun, not his handgun, when he fatally shot Harris during an arrest that was caught on video in Tulsa. (Cory Young/Tulsa World via AP)
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