The relevant background is this.
In the fall of 2008, a company called Paravant entered into a subcontract with Raytheon Technical Services Company to perform weapons training for the Afghan National Army. Paravant was created in 2008 by Erik Prince Investments (the company which is now named Xe).
On May 5, 2009, Justin Cannon and Christopher Drotleff, two men working for Paravant in Afghanistan, fired their weapons, killing two Afghan civilians and injuring a third. In reviewing the Army’s investigation of the incident, then-CSTC‑A Commanding General Richard Formica said that it appeared that the contractor personnel involved had “violated alcohol consumption policies, were not authorized to possess weapons, violated use of force rules, and violated movement control policies.” According to the Department of Justice prosecutors, the shooting “caused diplomatic difficulties for United States State Department representatives in Afghanistan” and impacted “the national security interests of the United States.” which had “no regard for policies, rules or adherence to regulations in country.”
Now, go look at the hearing documents posted online by Sen. Levin. Scroll down to Document 20, “June 9, 2009 Show Cause Notice from Raytheon to Paravant’.”