Whenever you have an incident like the Chas church shooting, the preexisting anti-gun lobby springs into action. It's just like atheists who repeat their stale arguments about the problem of evil every time there's a natural disaster.
I'd just like to make a little observation. On the one hand, these are people who don't think private citizens should own guns. Guns should only be in the hands of the police.
On the other hand, many of these same people decry police brutality. But in that case, they don't think the police can be trusted with firearms.
Moreover, if the police have a monopoly on guns, that will embolden them to be even more abusive to a disarmed and defenseless citizenry.