police say robert -lrb- bob -rrb- bates , 73 , thought he pulled out his taser during an arrest , but instead shot the suspect , who later died at a local hospital .
the shooting happened after an apparent , a group of deputies trying to arrest eric courtney harris , 44 , in the parking lot of a dollar general store .
bates , a member of the task force , was part of a group of deputies trying to arrest team .