There seems to be some room for innovation here. The police are throwing these things blind. Evidence? Well, I refuse to believe anyone, no matter how debased, would intentionally throw a flashbang into a baby's crib. What's needed is a flashbang that either won't go off if in close proximity to a living being (e.g. perhaps add an IR sensor) or a flashbang that is triggered remotely, so it can be thrown, spotted, and…
I partly agree. I don't think even the very worst cop would do it (so I agree it was unintentional in this case).
But I do think there are people who are debased enough to do so on purpose.