What do i do about someone forging my signature on 2 legal documents and having them notarised?

Here’s the situation, About 3 weeks ago I posted my car as for sale on craigslist and had a seemingly interested buyer contact me asking to come see the car the next day. When he got there he immediately tried to low ball me and talk me down from my asking price which a lot of people do but I was firm on the $2000 that I was asking. He finally agreed to pay me my asking price after trying to tell me there was something wrong with me transmission which was not true. However, I did not have title in hand because it was misplaced when I moved but is a clean title which he made sure of by calling the DMV and giving them my VIN number to run the title he knew all this before he came to buy the car. So we were going to sign a legal document called an MVR 4 form where I signed my name as the seller of the car and he signs his name as the buyer and have it notarised so the new title would be mailed to him in his name. Well, turns out he only had $1890 to give me that day and I desperately needed the money. So I wasn’t signing the title over until I got the rest of my money and my tags back which is was nice enough and apparently in this case dumb enough to let him use to drive the car back to where he was going but not before I drew a contract up stating that he was to meet me the next day with the remaining balance of $110 on the car and my tags and at that time I would sign the legal document making the car his. 2 weeks went by every day I called and left voice mails and text messages he never returned any of my calls or text messages, so my final message was that I was taking him to court. I didn’t know his address so I spent 4 days tracking him down online to find his address so papers could be served. Before I got a chance to file a law suit 2 men showed up at my home with a legal, notarised MVR 4 form with MY signature on it as well as the man who “bought” my car. I DID NOT sign that form or any other form other than the contract that I drew up previously for the man to meet me for my money and tags. So this man forged my signature on a 2 legal documents; the MVR 4 form and a new bill of sale to give to this man that he SOLD MY car to because the car is still in my name. Not to mention he had the legal document with my forged signature notarised and a notary cannot notarise a document without BOTH parties there with picture ID. So, I need to know what I can do. Obviously I’m guessing sue the hell out of the man who bought my car and the notary. I just need some legal advice. The men who bought my car from the scammer is also suing the man for the money he paid him for the car and falsifying a legal document. The men who bought my car told me I could come get my car at any time but I need legal advice before I do ANYTHING. I plan to contact a lawyer tomorrow I just wanted to know what a legal expert on here thought about the situation, thank you.