Appearing on Fox News on Monday, Gowdy told Martha MacCallum that “its really impossible to fathom a massacre on this scale.”

He also asserted that it is difficult to believe that a single person could carry out such an attack alone and undetected.

“It was an incredible level of premeditation that you don’t normally see, and it is difficult to believe that a single person could have done this without detection,” Gowdy said. He added that “a lot of crime is prevented because a non-law enforcement officer says something” and that he believes that it is likely we will find out that someone along the way thought that something was suspicious.

“I think we’re going to find someone along the way was suspicious they should have turned that suspicion into a phone call to law enforcement. It’s an incredible amount of premeditation to not go detected,” Gowdy added.