It's not clear (to me) whether the "through his lawyers" comment is intending to convey the reason the FBI doesn't believe he's cooperating. It could just as likely be setting up the next sentence which says the lawyers declined to comment.
If the "through his lawyers" comment was explaining the FBI's level of belief, it should have been stated more explicitly. I kind of doubt it though -- local law enforcement might be suspicious of someone who lawyers up, for the FBI, it must be pretty much standard (or at least not unusual).
If the "through his lawyers" comment was explaining the FBI's level of belief, it should have been stated more explicitly. I kind of doubt it though -- local law enforcement might be suspicious of someone who lawyers up, for the FBI, it must be pretty much standard (or at least not unusual).