Hi pookielou,
My experience is different.
I've heard shares by more than one AA speaker with something very similar as a part of their illness and recovery. Whether something happens during his jail time and it leads directly to recovery remains to be seen. Not likely; it has happened for a few. Alcoholism is a disease that is often confounding to those who have it.
I'm sorry for what you're dealing with. Take good care of you, and your little one.