What are the details of why they came to his house?
Angry neighbors and mean family members making false allegations to Child Protective Services is a known problem.
False allegations of spousal abuse and child abuse are common during divorce. False allegations of child sexual abuse are a tactic by some to totally remove the father from the child’s life so as to alienate the child.
Given the KNOWN regular abuse of these “believe the accuser, deny them their rights and assume guilt” in both of these systems, we know that there are angry neighbors and divorcing partners who will LIE about the person to have their guns taken away.