He can get blasted out of his skull as often as he pleases, and it will make no difference to the courts unless the children are proven to be in imminent danger. As Doggie pointed out, that means they'd have to be in the car when he snagged a DWI, or he'd have to be so incapacitated by alcohol that one of the kids got into something they ought not have.there is a pattern and I know because i lived with it.
As things stand, the court is going to be largely unsympathetic to you position, since you obviously found him suitable enough to make little people with in the first place. I know it's not what you want to hear, but reality can be a really harsh mistress some days.

