Urgent Help Needed. Inhabitable with family living there

[Zimean Vickers]

I need help bad.. I'm buying a home that I plan to demo and built on the lot. The home is inhabitable with no water, electricity, dog feces, no appliances, holes in the ceiling, rotten siding, & a lot more- Its a demo Heres the issue..The sellers sons wont move..One son lives inside and one son(paralyzed on one side of his body) lives in a trailer on the lot. They dont pay to be there, both alcoholics taking advantage of their dad and they have been physically abusive to him. Thank God dad lives somewhere. What do I do?...Can I remove them once the sale is complete, do I have to evict them, can they be forced out due to the living conditions? I already signed to purchase and I want this lot..But I'm very nervous about the sons living there. I dont wanna be sued or fined. I need a mentor...If your in my on area PM me plz. Thanks to you all for your helping me.