If the police had acted one of the 39 visits he might have had a record that would have prevented him from purchasing a firearm. Once again, the laws are in place. Just enforce them. No new laws necessary.
Too bad the police did not act during one of the 39 visits. The mom probably backed down and refused to press charges against him. The deputies failed to act on her behalf. They were too nice to him and did not enforce the law.