My character is a young police officer in a town in Iowa. When he's at home with his girlfriend - therefore off-duty - someone breaks in. His girlfriend tackles the intruder and my character grabs his gun and fires, but hits and kills his girlfriend instead of the intruder.
1) What would happen to my character in this scenario? Would he be charged with a crime? Would he have a legal defence? Would he be treated differently because he's a police officer, despite not being on the job at the time?
2) He then moves to Maine. Would he be permitted to serve as a police officer after previous events?
Thanks for your help. I've tried searching Iowa statutes and case law, plus officer-involved shootings, and haven't found anything definitive.