It seems to me that the government doesnt have very much sense when it comes to secret.....stuff. Take Area 51 for an example, they could have just given us the name of the base and told us there were secret tests going on there and left it at that. Trying to deny it's existence and lying about the things going on there only make us curious and more persistant to find out about it.
And about your first statement. He seemd to know they would catch him so if I was in his place I would as much as I could, got nothin to lose at that point right?
I myself am a firm believer in "aliens" and the like.
Sol