Ever played poker? It's called a bluff.
They didn't evac, so perhaps he forced the info he was seeking. Putting myself in his shoes (and I do wear his shoes, in a manner of speaking) after evaluating the risk and likelihood of a frozen terrorist as described and weighed it against the risks associated with an evac, staying put seemed the best option. Arriving at that conclusion requires information, not an intentional effort to keep them In the dark. If getting the full story requires upping the ante, then so be it.
Well done skipper.