A stunned passerby filmed officers confronting 63-year-old Judah Adunbi – who works to smooth relations between police and the black community – and ask for his name.
But when the indignant grandfather refused and tried to enter his home, officers shouted “Taser” and shot the electric gun at his face.
Mr Adunbi, one of the founders of the Independent Advisory Group set up by the police with the BME community in Bristol, then fell to the ground.
Embarrassed police chiefs have admitted the local community in Easton, Bristol – and the BME community as a whole – would “have concerns” about the incident.
VIDEO: Police officers taser founder of their own race relations group after mistaking him for wanted man