On television, I watched Texas Rangers string yellow tape around a treasured church. The crime scene included cars and pickups of people lying dead inside a house of worship. There were probably rifles and shotguns in many of those vehicles. Deer, turkey, duck and goose season opened there the day before the mass murder. Javelina and quail season had been open since September. Feral hogs can be shot on sight year round. There were undoubtedly hand guns in some vehicles, but I doubt there was a single firearm owned to kill people.
We could treat firearms the way we do our automobiles.