Col. Ralph Peters told Fox News host Neil Cavuto that terrorist should be killed. "And again, Neil, once you commit an act of terror, in my book, you are outside, you are anathema, and you should be killed," said Peters.

Appearing earlier that year on the conservative news network, former CIA officer Gary Bernsten argued that Guantanamo Bay detainees should be executed.

"Many of those individuals that are there are enemy combatants and that's based on the Geneva Conventions and should be executed," said Gary Berntsen, who spent 20 years with the CIA, to Fox's Gretchen Carlson on the show, Fox & Friends. "It's ridiculous that the Bush administration, after seven years, didn't deal with many of those that we know are enemy combatants."

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Berntsen also advocated for the execution of self-described 9/11 mastermind, Khalid Sheikh Muhammad, saying that he no longer serves any intelligence purpose for the U.S.

"After seven years, the intel is dried up. Execute him," he said.

Bernsten, a Republican candidate for Senator from New York, recently received attention due to a widely circulated email calling for voters to choose him for his position that detainees should be killed.

Gary understands that there is no reasoning with these people, and we need to take them out back and shoot them in the back of the head. Then, bill their families for the cost of the f***ing bullet.

When asked for comment, Matthew Richter, a spokesman for Bernsten, stood by the candidate's remarks but said, "let's not lose sight of the fact that Gary and his team captured many of the detainees in Gitmo and after 8 years of incarceration Gary simply wants to see these cases tried and concluded."