Media Matters has done an incredible investigative piece looking at Byron Williams, a right-wing extremist who got into a firefight with California Highway Patrol while on his way to kill people at the Tides Foundation and ACLU.  In a jailhouse interview done by an independent journalist, Williams credits Glenn Beck’s conspiracy theory chalkboard and extreme rhetoric as the driving force for his belief that violent action needed to be taken.

This is by no means the only example of right-wing extremists, fueled by Glenn Beck, Michale Savage and Rush Limbaugh, who has turned to violence during the Obama administration. But it is the most direct line, where a murderous shooter credits Beck directly for the source of his commitment to action.