I encourage the calling of police if you know someone is driving under the influence - whether that someone be your child, your ex-spouse, or current spouse. In fact, Sting I would hope that I would see her get into a car intoxicated, so that I could make the call. If we cross our fingers and hope nothing bad will ever happen, or do things to get in the way of their consequences, it is just that much more difficult for everyone to really see there is really a problem.
Transform, are you locking the doors of the house at all times - whether you're there or not? Does he have a key? If so, what if you changed the locks? (I know, I know, you're not divorced yet)
When it rains, it pours.