A California deputy is under investigation, and has been reassigned outside the police department, after a disturbing viral video showed him punching and choking a teenage boy during an arrest, authorities said. The Rancho Cordova Police Department and the Sacramento County Sheriff’s Office announced an “investigation into the use of force by our deputy” after a video of the April 27 incident posted on Twitter on Tuesday received more than two million views and was shared by former Democratic presidential candidates Julian Castro and Sen. Kamala Harris (D-CA).