It showed Marine A shooting the Afghan prisoner with a 9mm pistol, and saying: "There, shuffle off this mortal coil... It's nothing you wouldn't do to us."
He adds: "Obviously this doesn't go anywhere fellas. I just broke the Geneva Convention," to which Marine B replies: "Yeah, roger mate.
so he knew what he was doing,
Gen Sir Mike Jackson, a former head of the Army, urged people to keep "a sense of proportion" but said he was "saddened" by the case.
"I'm afraid whatever casualties the unit had taken, didn't change the law.
"It's not about whether the Taliban do or do not adhere to whatever set of rules, if any. It is about the standards which apply to the British armed forces which are drawn from the Geneva Convention."
He added: "The fact that a trial has taken place, I would argue upholds those standards."
http://www.bbc.co.uk/news/uk-24870699