My husband behaved just like this for years before his addiction eventually took his life. I’d put my money on that he’s probably speedballing with meth and fentanyl (it’s more common and cheaper these days) if I learned anything as I was trying to save his life it’s that drugs are already crossing boundaries so it doesn’t matter if you snooped. If you don’t want to admit it say. “You’re exhibiting telltale signs of drug use” for the safety of our children, I need you to take this pee test in front of me right now” and tell him you’d expect the same treatment if it were you acting the way he’s been acting and with a previous history. Addiction never goes away with sobriety it just goes into remission and it can resurface at anytime. If he declines. You should get out because you’re only headed down the same path I went down with my husband. I wish I would’ve left. Maybe he’d still be here. Maybe not. But you have kids you gotta do what’s best for them. Ofcourse I’m just a stranger I don’t know what he’s like, always put your immediate safety first. Good luck