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In this photo provided by the Tulsa County, Oklahoma, Sheriff's Office is Tulsa County reserve deputy Robert Bates. Police say Bates, a 73-year-old white reserve deputy, thought he was holding a stun gun, not his handgun, when he fired at 44-year-old Eric Harris in an April 2 incident. Harris, who is black, was treated by medics at the scene and died in a Tulsa hospital. (Tulsa County Sheriff's Office via AP)
In this photo provided by the Tulsa County, Oklahoma, Sheriff's Office is Tulsa County reserve deputy Robert Bates. Police say Bates, a 73-year-old white reserve deputy, thought he was holding a stun gun, not his handgun, when he fired at 44-year-old Eric Harris in an April 2 incident. Harris, who is black, was treated by medics at the scene and died in a Tulsa hospital. (Tulsa County Sheriff's Office via AP)

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    Documents: Tulsa deputy received 'special treatment'

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Documents: Tulsa deputy received 'special treatment'

CNN's Nick Valencia reports volunteer Oklahoma deputy Robert Bates, who accidentally killed a man, received preferential treatment during his training.

Documents: Tulsa deputy received 'special treatment'

CNN's Nick Valencia reports volunteer Oklahoma deputy Robert Bates, who accidentally killed a man, received preferential treatment during his training.