When RAH was drinking I wouldn't leave my cats with him to take care of if I was going out of town. Perhaps in the future a kennel would be a better choice for new Pup doesn't sound like AH is really in any frame of mind to take care of himself much less a helpless animal.
Sounds like a relapse to me and good for you that you are at a point you aren't willing to engage in trying to find out if he did but...........
I would have kicked his A** if I came home to that mess.