So they knew he might be armed from prior arrests, but they didn’t even undertake the minimal amount effort it would have taken to know whether the guy was in the home? What if they’d stormed the place and there were 4-5 armed guys there? They wouldn’t have had a clue. It was stupid on every level.
The woman should get a lawyer for a civil lawsuit. Taxpayers not perps (sheriff etc) would pay, but the family would at least get help for medical bills, later care if the child survives, and more than a little pain and suffering.