Contractors are not bound by law. They are bound by profit:
The video, which first appeared on a website that has been linked unofficially to Aegis Defence Services, contained four separate clips, in which security guards open fire with automatic rifles at civilian cars. All of the shooting incidents apparently took place on "route Irish", a road that links the airport to Baghdad.
The video is available for viewing here.
Blessed are the war-makers, for they kill for sport and money.