He said it had "significant radicalising potential that would be a gift to terrorist organisations as it would play on the central narrative about the nature of Western forces occupation".
"I also have no doubt that if released there is a very high risk it would be used as propaganda material by terrorist organisations in order to radicalise others."
Three Marines have pleaded not guilty to murdering the captive in a court martial at Bulford military court in Wiltshire.
