I can’t get a good answer for this as Google is thinking I’m talking just solely on the driver. I’m including passengers who don’t. I’ve seen PSAs that tell you the dangers you pose for others as well when you don’t wear a seatbelt. So if you don’t wear a seatbelt and that results in someone being killed could you not wearing a seatbelt mean you get a manslaughter charge?
I’ve heard it mentioned that a passenger in the rear without a seat belt becomes a projectile in a crash and can kill or injure the person sitting in front of them.
That’s on the driver. If you’re driving, you are responsible for everyone in the car and out of it. If you drove off with someone unbuckled, that’s on you.