What can be done if my daughter was put out of her fiance’s home in the middle of night by his son and was not given any notice or 30 days?

This is not for me. It is for my daughter in TN. She lived with her ex husband and fiance for 3 years. He died 3 weeks ago. His son’s got the sheriff to put her out with her 15 year old child at night. She had nowhere to go. What is so bad about this is she was called every name in the book at his funeral. We take her to a protection order. She could not get one but the son’s got from the same sheriff that denied her. Also, what is the law against them doing that to a minor child? They said she would not let them in and that is a lie because there were 4 people there. He did leave a will. She should have had 30 days not 30 minutes.