It'll have to be some sort of story to have a logical plot that landed O'Keefe innocently in that office in those circumstances. But I guess strangers things have happened.
Maybe it’ll turn out that some of those guys were trying to frame O’Keefe, but using his well known expertise at recording conversations, he’ll have it all recorded and be able to prove his innocence, and the guilt of those trying to frame him.
Might as well engage in a little speculation.