Collins was killed in the gun battle, which lasted about 20 minutes, from 8:00 p.m. to 8:20 p.m. He was the only fatality. He had ordered his convoy to stop and return fire, instead of choosing the safer option of driving on in his touring car or transferring to the safety of the accompanying armoured car, as his companion, Emmet Dalton, had wished. They do not know who fired the fatal shot.