Should he be charged?

Me

I just read about this story that occurred in a town close to where I live. Apparently there was a dog that ended up being hit by a car, the driver got out and attempted to find the owners but was unsuccessful so he drove off. A man then came out his house and started shooting, another man who was visiting another home then also fired shots in return killing the other mans wife and wounding him. The second guy who shot his gun was not charged for shooting the other man but was charged for murdering the mans wife. They think the dog belonged to couple and that the man started shooting at the other thinking he was the one who hit and killed the dog. Do you think the second guy should be charged even though he just defending himself or do you believe he should go to jail due to killing the woman who had nothing to do with the situation?

I