<human>: Can you succinctly summarize the text in 1-3 sentences?

I'm hoping you guys can offer some advice, or at least tell me if there is nothing to worry about.

I bought a house (in Michigan, USA) from an elderly couple almost two years ago. During the closing process, the grandson tried to stop the deap by going to the realtor and accusing him of under estimating the value of the house and cheating his grandparents. The couple still wanted to sell, thought it was a fair deal, and we closed.

Fast forward a few months, and I am still constantly getting this guy's mail. I put it back in the box with "return to sender" notes, no big deal.

Then last fall (about 15 months after closing) he gets totally smashed and forgets he doesn't live here anymore, crashes his car into my ditch and totals it. I stayed inside, called the cops and they took him away and charged him with DUI. About a month after that, I get a letter from the disctrict court addressed to him, and I can read through the envelope (I did NOT open any of his mail, I could read a few sentences through the envelope) that its about his probation for DUI, I call the court and tell them that if he gave them this address, he lied because I own the house now.

A few months before the crash my screen door had been ripped off the locking part, and now I wonder if it was him forgetting he doesn't live here (but I have no proof, it's just a theory). 

Just this week I got a rejection letter for him from Direct TV, he had applied with my address.

Should I be worried about all this? Should I talk to a lawyer or the police, or would they think I'm crazy? I'm not really sure where to start, any advice eould be appreciated.
<bot>: I bought a house and one of the old tenents has forgotten he doesn't live here at least once and keeps giving people/businesses this address.