Body worn camera footage of a man spraying ammonia into the face of a Met Police officer before threatening him with a gun. James Boyle, 22, of Pulross Road, Brixton, London was sentenced to 16 years' imprisonment at Kingston Crown Court on Monday, March 13, having pleaded guilty at the same court on November 11 to administering a poison or noxious substance with intent; possession of a firearm with intent to cause fear of violence; using a firearm with intent; assault (actual bodily harm); possession of a bladed article (knife); possession of a bladed article (axe); having a corrosive substance in a public place.