quote 2

"Another legal problem is that PMF employees are usually exempt from the military laws that govern how troops behave in a conflict. Although soldiers from several coalition members in Iraq have been convicted of crimes against civilians, for example, not a single military contractor has been charged with a crime there since the U.S.-led invasion in March 2003."

This quote shows that PMCs are not capable of being charged with anything out in the battle field with anything.  Showing that they are not constricted by the same laws as soldiers in the army.
Outsourcing War—The Surge in Private Military Firms." Encyclopædia Britannica. Encyclopædia Britannica Online School Edition. Encyclopædia Britannica, 2010. Web. 18 Nov. 2010  <http://school.eb.com/eb/article-258186>.