Legal Question in Real Estate Law in Indiana

Re: trespassing

Probably not. However he might be able to use reasonable force to hold the trespassers for the local authorities to come & arrest them if they also agree these persons are trespassing. The best solution short of arrests is for either or both sides to petition the local courts for a protective order or injunction to prevent the trespass (if that is what is happening) or to prevent the pointing of a gun (if there is no trespass).