What's the next step in this crypto scam my dad has been suckered into?

TLDR: Dad is getting scammed. He says he's just on his own Coinbase account so it's safe. My broke dad just had a $40k deposit and withdrawal fly through his account yesterday. This is a joint account with my mom. What's the next step for this scam?

My dad (66M) is getting scammed and I'm trying to get ahead of it as much as I can to protect my mom, who is still married to him and sharing what little assets they have with him. My folks are poor, living on social security, government assistance, and me. They don't have ANY money to lose, but they do have a house. My dad thinks he's the only one on the deed. He's not. My mom is too and she would never agree to sign anything. There are probably leans against the property from his poor business practices and he owes a megaton in federal taxes from never filing. I'm not too worried about something happening to the house, but I don't know what i don't know.

He is desperate for money and lets his pride/ego guide his actions. He spun out of control after he recently had to put his dog down. He left his church & an obligation he made to play drums there. He's preparing to leave my mom. He's possibly leaving for a job 900 miles away that's also probably not real. He's also never been able to work for anybody else longer than a few weeks before quitting or getting fired. His own businesses have failed time & time again. I think he's having an emotional affair & maybe with the same person that's scamming him.

As awful as all of this sounds, I love my dad and I'm very scared of what he'll do when this all crumbles and he finds out there is no get rich quick crypto guru helping him & the "woman" he's talking to is not real either.

There's no talking reason into my dad. Just a few weeks ago he got scammed out of $120 in a crypto scam after I took him to lunch and explained exactly what & how it would happen. He did it anyway. Just like he's going to do this anyway.

It might be too late. Yesterday Mom called and said there had been a deposit of $40k in their joint account then removed or withdrawn almost immediately. He mentioned nothing to her prior to this and said it was supposed to be in his business account. So maybe it's in his business account. Maybe sent back to the scammer. I don't know.

All that being said, he's doing this to himself and what happens is on him. The things is, this is going to affect my mom. How is she going to get her assistance when there's a $40k deposit & withdrawal in her account? How's she going to live when her social security check is frozen or stolen?

He says he's still on Coinbase & it's his own account. The scammer probably doesn't know he doesn't have any money or assets. What's the next move here? Is there anything i can do?

TIA!