Assume that the guy was lying and shoot him.
Just kidding. Sounds like you did everything pretty much right. If I had an uneasy feeling about the situation I would have had my hand on my gun. Not drawn just have my had where I could pull it quickly if I needed it. Always remember the color codes. Be in condition yellow never in condition white.
By faith Noah,being warned of God of things not seen as yet, moved with fear,prepared an ark to the saving of his house;by the which he condemned the world,and became heir of the righteousness which is by faith Heb.11:7