BELTON (AP) – A trial has begun in Central Texas that’s drawn the attention of gun-rights advocates who question why a police officer confronted a man legally carrying a semi-automatic rifle as he hiked with his son.

Army Master Sgt. Christopher Grisham is charged with a misdemeanor count of interfering with the duties of an officer. The Temple Daily Telegram reports  a jury was seated Tuesday in Belton, southwest of Waco.

He was arrested in March by a Temple officer while hiking with his 15-year-old son. Grisham was carrying an AR-15 rifle and a concealed handgun, for which he had a permit. Texas law allows for rifles to be carried in public.

Officer Steve Ermis says he was concerned because he didn’t know Grisham’s intentions. Grisham says he was carrying the rifle to protect against aggressive wild hogs.

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