Surveillance video shows a group of five people running after the victim, who was struck and fell hard on the sidewalk. He was left unable to move.
The video appears to show items being taken from the victim. The persons of interest ran off.
The assault happened around 11 p.m. Monday in the 1000 block of 1st Street in Northwest D.C. A reward of up to $1,000 may be offered in the case.
Call D.C. police if you know anything about the assault.