San Francisco police have arrested Andrew Davais after he allegedly assaulted a pedestrian in a seemingly unprovoked attack.
A nearby witness used his cell phone to record the suspect, followed him, and called 911 to report the crime to police.
Andrew Davais Arrested for Alleged Unprovoked Attack in the Castro Caught on Camera
Video footage appeared to show a man walk up and hit someone in the face before calmly walking away.
SourceNBC Bay Area News