it is obvious that Michael did the shooting if you look at how everyone was positioned.
I think that Henry is the lead man as when Kate and that went back to where (forgotten her name) had the baby, they found all fake beard and stuff. and if you remember when Jack was surrounded the lead other had a beard! but if you watched this last night you probably already know this. i havent seen last nights yet, (on E4, so i dont know)
Put a dirty nappy by his nose