Purchased land and former owner wants land back. I have the title and it is registered in my name at the court house.

In Texas, once a person receives a deed from the owner in exchange for money, that person becomes the new owner whether you file the deed in the courthouse records or not. If you have the deed from him to you, the house belongs to you. You said the title is registered to you in the courthouse, which hopefully means that you filed the deed of sale at the appropriate court house in your county. If you did, you are the true owner. There may be some way that the two of you can arrange a landlord-tenant arrangement since you let him live in the house, but it sounds like he would not go for that. I would need more information to be of help to you. For more information about what I do, please visit http://mosslawhouston.com/houstonoil-gas/