As posted/stated already IN this case the son of the home owner was not charged.
However here is a link where a home owner was charged. He found his shop/business on his property broken into went back to his house got his gun then came back and shot the intruder. If you leave and come back unless there is anther person / family member in danger I think you are going to get charged. Now if you open the door to your shop and some one is inside and rushes/ threatens you and you shoot them legally you are OK. I think he told the police he left the building and then came back.
I think reading and knowing what the laws are in your state is a must, if your life or someone else is not in immediate danger , as in you have time to go somewhere and come back, you might not want to be the first to shoot or at least not tell the police everything.
Self Defense? Washington Man Faces Possible Murder Charge for Shooting Showering Intruder - NBC News