Yes please do not confront him, high, coming down, or even if he hasn’t used. Methamphetamine users are highly unpredictable and violent, and he already proved he will snap. If forced into a corner no one can predict how he will react. And I say this with an understanding, YOU are not equipped to handle him.
This is a dangerous play ground. If he left, be grateful. Although in time he will probably be back … prepare for that. If he takes the steps to get himself help, it will be obvious, if he doesn’t that will be equally as obvious and you will see comparing out ( I am not as bad as, which in actuality is them telling exactly how bad they are ) downplaying, a lot of blame and excuses for everything on everyone else but himself.
Educate yourself, find cynical’s blog, that is the best one stop shop in town. Loaded with information! And get yourself some support as it won’t hurt at all.
Take good care of you and your daughter.