A British royal marine who was found guilty by a military court of murdering an injured Afghan insurgent is to face sentencing on Friday (December 6).

His November 8 court conviction was the first time a UK soldier has been found guilty of such a crime relating to the war in Afghanistan.

Two other marines were acquitted of killing the unknown man in Helmand Province in 2011.

The three were known in court as marines A, B and C as their identities have been withheld under an anonymity order.

The jury at Bulford Court Martial Centre in Wiltshire heard that the victim, already severely injured by an Apache helicopter after an attack on a local patrol base, was shot at close range with a 9mm pistol by Marine A in a field.

Audio clips of a video showing the killing inadvertently filmed by Marine B on his helmet camera were released in court in November, but the judge blocked the release of the full video evidence to avoid it being used as propaganda.

In the clips, Marine A can be heard shooting the man and then saying: "There you are. Shuffle off this mortal coil. It's nothing you wouldn't do to us."

He then added: "Obviously this doesn't go anywhere fellas. I just broke the Geneva Convention."

Marine A was an experienced sergeant at the time of the shooting and will now be sentenced at a later date, but faces a mandatory life sentence.

Marine B was new to the Helmand base where the other two were based. Marine C was the most junior of the men.

Presented by Adam Justice