How do you deal with a tenant who is squatting?

[Jake Burhans]

Hey guys,

I have a seller who is looking to sell her single-family home but has an old relative who has been squatting in the house for over 2 years. The relationship has gone south and I can't even get in to take pictures of the house (tenant refuses). The tenant claims that if she tries to evict him he will destroy the house. The seller is a reserved old lady and clearly does not have a grip on the situation. Any suggestions on how to deal with the situation? I know cash for keys is an option, I'm assuming I would look to put the property under contract and then go to the tenant and offer cash for keys? Any suggestions are greatly appreciated, thank you!