Cellphone video shows members of a crowd jostling a police officer in Tennessee on Tuesday as he attempted to arrest a man suspected of assaulting a woman, authorities said. Shortly after 6 p.m., Officer Matthew Cammarn witnessed the alleged assault by 22-year-old Brian Shannon near the intersection of South 7th and Sylvan Streets, according to a statement from the Metropolitan Nashville Police Department. The suspect “aggressively walked up to the officer,” who told him to put his hands behind his back and attempted to take him into custody, the statement said. Shannon allegedly pulled away, grabbed Cammarn and pulled him...