Lean on property advice

[Bryce Vaquera]

Hi everyone, we are in need of advice on a lean.

 So my mother is buying a condo for my grandma and it is perfect. We need to get my grandma into this area because of her age. we found a place and the offer is already accepted and we were supposed to close but there is a lean.

I hope that someone on here can give me some advice for my mom. 

There is a trust lean on the property. The son of the owner wants his moms trust fund so he put a lean on the property. The son of the owner literally said he needs his mom to die so he can get the money!!  My mom was on way to closing and then the lean popped up. My mom wants to contact a lawyer and sue him. Does anyone have any advice for how to get rid of a lean with no number? So that we can get my grandma closer to us.

What are our options? Never been in this situation and we don't know what to do.

Thank You