Legal Question in Constitutional Law in Ohio

I'm afraid your question isn't very clear. There's no such thing as an accidental murder, and manslaughter is not the same as either murder or an accidental death.

These are all typically state-law crimes, and different states impose different sentences for them. (Your question says you're in Ohio, but you asked about a "US sentence" generally.) In many instances, there's a range of available sentences depending on the facts.