Surveillance video: Knockout punch

Police are asking for the public's assistance in locating a male black 20's wanted in connection with an assault that occurred at approximately 02:25 hours in front of 227 Bowery in the confines of the 5 Precinct. The suspect approached the 23-year-old victim from behind and struck him in the face with a closed fist before fleeing on foot. The victim lost consciousness and woke up at Bellevue Hospital with a broken jaw. (Credit: NBC New York)