Not a big fan of gateway Pundit! In general, I find its hyperventilating headlines very misleading and annoying! In this case its on the money.
There's a Atlantic article on Mongomery - The Man Who Conned the Pentagon I think is the title. Article dates back to the early 2000s.
Also remember he also conned Sheriff Arpaio and his deputy over Obama birth certificate validity. Note I am not saying the birth certificate is valid just saying Montgomery took advantage of the situation there. Why hasn't he been prosecuted? It's too embarrassing to the organizations and the people he's conned. That's his MO, insert himself into a emotionally charged situation where he senses the leader or leadership is not technical on IT things & then make outrageous claims. Claims they are cognitively biased to believe. Claims that can't be checked because only his proprietary software\techniques can find it. He collects his "fees", later it all blows up and the "marks" are to embarrassed to take it any further. Now I think he's an "agent provocateur" for the government, probably the FBI. I think that's what he did to Lindell. Just ask yourself other then Montgomery who benefited?