WFAA – DALLAS – The Dallas Sheriff’s Office has launched an internal affairs investigation into the conduct of a deputy who made a questionable arrest of a sport biker, following reports from News 8. The arrest happened on Memorial Day weekend, as law enforcement was on heightened alert to crack down on reckless bikers. But was that reason enough for Deputy James Westbrook to pull over biker Chris Moore in an effort to seize a camera mounted on his helmet?