Of course he was charged. You have the right to self defense, and you have the right to use lethal force in self defense if faced with an imminent threat of being killed or seriously injured. That does not apply here. Once the shooter left the house, there was no imminent threat. He should have called the police to deal with the intruder.
These type of incidents and those who defend the shooter in them just give lefties ammunition for their gun control argument. This one’s a no-brainer. You don’t have the right to shoot someone simply for tresspassing; there must be an actual threat.
Once you enter a home, it is no longer a simple trespass. Still, probably not a good idea to kill the guy.