Let's use some common sense for a minute. They obviously have all your information which means they also know where,when, and by whom the money was sent by. If this was some elaborate investigation they would have video of the entire transaction to refer to. You would already be dead to rights to be honest.
Exactly! And WU isn't investigating illegal activity. They leave that to LE. My guess is WU executives are well aware that a fairly large percentage of their transactions and their profits are for illegal activity.