But only if they kill with a gun, right? What about knives? Hammers? Cars? Prescription drugs?
It's ridiculous. If they didn't properly store their guns, where it's required by law to do so, that's one thing, but just a blanket law where you're held legally responsible for your kid murdering people is absurd. Not only that, but think of the societal impact. Kids are sheltered enough as it is. Now put legal risk to parents for what their kids might do, into the fold. You may as give the parents a leash to keep their kids from doing anything they can't control.