Fact check: historian Ragone errs on grassy knoll testimony

"There was no contemporaneous account of people who were there that there was a gunman on the grassy knoll," presidential historian Nick Ragone told CNN's Erin Burnett on Friday.

That statement is inaccurate. In fact, as JFK Facts has documented, there were 21 law enforcement officers on the scene who thought a gunshot had come from the area in front of …