NEWYou can now listen to Fox News articles! As about a dozen cases involving missing or deceased American nuclear scientists have come to light, a retired high-level FBI official says some of them fit a pattern that he considers suspicious.”The missing [and] disappearance thing is suspicious inherently,” said Chris Swecker, who served as assistant director of the FBI. “What they were working on would certainly, without a doubt, be a target of a hostile foreign intelligence service like Russia or China. It could be Iran, could be Pakistan.”Swecker believes the six deaths that have been widely reported don’t have much…