Martin Montgomery, 31, confronted Nigel Mazs and some friends as they were taking drugs in the stairwell of Malakoff Close, Great Yarmouth, where he lived at the time.
Norwich Crown Court has heard that Mr Mazs suffered a catastrophic brain injury when his head struck the floor after being kicked by Montgomery.
Norwich Crown Court (Image: Peter Walsh, Newsquest) He died in hospital on January 4 this year, almost two weeks after he was found by police in........