Strange. I default to "innocent until proven guilty," not "well, the cops thought charges were warranted, so I'll just default to guilty until proven otherwise." Yikes, brother -- you do you lol.
As I stated, though, I support states whose laws direct charges to the initial criminal instigator. For example, getaway driver gets charged with manslaughter/murder if their accomplice is killed during the commission of the crime they were committing. I hate to call it "justifiable negligence," or something to that effect, but -- when you are met with deadly force and not all of your rounds land on their intended target during a gunfight, I'm shocked that would drum up charges. Police do it literally every day.
All that being said, no telling exactly what the homeowner said to incriminate themselves when trying to "help" by talking to the police. Right after firearm safety and a couple of training courses the #1 thing I tell my friends seeking firearm ownership is to watch a few recommended videos on how to speak to police re: firearms.