Officials told the newspaper the move was necessary to ensure there were no guns accessible by children in the family’s home. They also said comments by Sansone’s daughter, Neaveh, that the man holding the gun in the picture was her dad and “he uses it to shoot bad guys and monsters,” was concerning.
I don't know the technicalities of the law, but I can't believe there isn't grounds for false arrest. I suspect that he might not sue the police because he'd just want it all to go away.