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An ex-Royal Marine who was accused of the murder of a wounded Taliban fighter has told this programme he tried to kill himself after hitting "rock bottom".

Sam Deen, known until now as Marine E, admitted that in Afghanistan in 2011 he offered to shoot the insurgent, who was then killed by Sgt Alexander Blackman - also known as Marine A.

Charges against Mr Deen were later dropped.

He believes not killing him would have risked British casualties.

"I didn't feel like I did anything wrong," Mr Deen told our reporter Claire Jones.

"He was going to die anyway. He was probably already dead," he added.

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