If someone had someone bring a title of a vehicle to the hospital to sign it over but the person who had to sign had been heavily medicated for pain before surgery, is that legal?

If you can prove that he was incompetent to sign then yes.

But what does this have to do with criminal law?

A few issues, first how did they get the title that was in this other persons name, what is their relationship to this person. I mean they are normally at least in your home in a box, but normally in a safe deposit box or something.

It also means the car did not have a loan against it.

What medication was the person on, will this person be able to get medical records to prove.

So they sue the other person who did this and who had title signed over to them in court.