Sounds as though the child was being held hostage or used as a human shield, or that was the LEOs’ perception of the situation. The child is safe, so I’ll withhold opinion until I get more info.
I don’t withhold anymore. The cops have adopted an obscene paradigm that is 180 degrees out of phase with Mayberry. Imagine a private citizen engaging another private citizen in the same way that cops do indiscriminately. A cop has no more right to initiate lethal force than I do. I suspect that if a neighbor had taken similar action because he “thought” the baby was in danger and he “believed” that the perp had a gun he would be arrested, tried, and convicted. Cops are using deadly force more and more even if the justification is threadbare.