A simple - AND FOOLPROOF - way to get out of this situation.

Have some older friends dress up in black cargos and a black top. Voice disguisers will help here. Wear balaclavas, bring some blank firers and get some blood. YOU MUST use your friends blood. The easiest way to do this would be for him to donate some blood (its only a pint), and then just nick it as he leaves. He donated it, its his property, so he is entitled to it after all. When yer mates parents are out, have the guys storm in the house, set up a camcorder, make a brief statement on some bollocks on why you want to kill him (for added authenticity, learn Arabic and name yourselves 'Liberators of America' or some bollocks). Just as your about to shoot, he struggles, falls to the floor and you fire off a shot. Squeeze blood onto floor, 'kidnap' the 'dead' friend, leave videotape in the house. Then he can stay out for as long as he wants, whenever he wants :thumbsup: