Mother Hired Mentally Unstable Neighbor To Work On Home Who Is Moving In Property And Now Harassing Her.

Long story try to keep short. My elderly mom has a crazy neighbor that she has had working on her home for two years. Something that should have been done quickly. The neighbor is in trouble with the city. He started moving tools and personal possessions into her home. She felt sorry for him and thought it was shortterm. But he never removed it. She asked him several times to take his things. Another neighbor got involved and got the keys to her property back from the contractor. But now he is harassing her and calling her in the middle of the night wanting his stuff but never coming to get it. What is her recourse?