"wanted for murdering" is the correct term when you have a warrant out for your arrest as al-Sadr does, McGrath. It's not a presumption of guilt.

"When there was an incident last year, where some American troops shot dead a bunch of demontstrators?"

It was never very clear who started that shooting, was it? I also remember the scenes from Najaf where the troops backed away from a crowd to avoid a conflict. US troops are hardly eager to fight civilians, but as you say, it's a complicated war out there, particularly when you have no way of telling who the good guys and the bad guys are. The best you can do is to return fire judiciously and that's hard to judge if you're not the one getting shot at.