Simon Richardson knew headteacher Michael Mullins was under his 4×4 as he kept driving in Manchester, jury heardA motorist who drove through give-way markings, collided with a cyclist and then dragged him, trapped under his car, for more than a mile has been found guilty of murder.Simon Richardson, 35, crashed into headteacher Michael Mullins, 56, who was cycling home from work at Stretford grammar school, Greater Manchester, on the evening of 20.