On 23 August 1971, Richardson assisted in a
car chase of a gang of five armed robbers who had attacked a jeweller's shop in Blackpool. As the gang split up and attempted to escape on foot, he and
PC Carl Walker, who also later won the George Cross, chased one of the raiders, Frederick Joseph Sewell (known as "Fat" Fred), down a dead-end alleyway. Sewell shot Walker in the thigh before Richardson tackled the gunman and attempted to persuade him to surrender his weapon. However, Richardson was shot twice in the stomach at
point-blank range and died of his injuries later that day at Blackpool's
Victoria Hospital. ==Funeral==