Chaimfan, the US government didnt kill the Rav but they certainly looked the other way. As Colonel Salem personal aide to Sheik Rachaman was a FBI, British, Egyptian, Israel, informant. And in fact Yekutiel Ben Yaakov had agreed to pay him to produce the documentation for this. Before this could happen Salem went into protective custody so he could testify against Sheik Rachaman for the bombing of the WTC.