I think this is the opposite of the old saying about divorce... "It's Cheaper To Keep Her".
Regardless of the crime done, it is cheaper to send them home than to let them stand trial. They will more than likely make their way back here again,
but under a different alias. In their mind...no harm. No foul.
Of course it's ludicrous, idiotic, and just plain ignorant. But, what else can we expect at this point? The right thing? Hardly.