TULSA, Okla. (AP) — Prosecutors have charged a white reserve sheriff's deputy in Oklahoma with manslaughter in the shooting of a black suspect.

A second-degree manslaughter charge was filed Monday against 73-year-old Tulsa County reserve deputy Robert Bates.

Police have said Bates thought he was holding a stun gun, not his handgun, when he fired at 44-year-old Eric Harris in the April 2 incident.

A man can be heard apologizing and admitting to shooting a person in a video that documents the killing.

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(Photos: REUTERS/Tulsa Sheriff's Office/Handout via Reuters/Landov)