The man definitely sounds like an honest man who is deeply offended by the behavior of the agents who spoke to him.
Could be. But two high powered pieces in the Baltimore press today, one being by a celebrity ex-crime reporter and author of the landmark Homicide series, tells me that there's an offense play in the works that the FBI wasn't ready for - especially with the sudden flurry of names thrown out to the public. Oh yeah, there's a little bit of a panic right now. Just too bad it came out on a Friday and not a Monday.