I think both a criminal whose accomplice was killed during the crime and a gun owner whose gun was used to kill someone should be charged with a crime less severe than murder.
I as well
If I steal your car and run a family off the road do you get charged as well?
No, and if a gun owner reports their gun stolen or lost as soon as they know it's stolen or lost, I don't think they should be charged with a crime, either.
What if you don't immediately report the car stolen, murder? What if the car is used to kill someone before you know it's stolen?
What about people who sell drugs (street or prescription) to other people who OD and die, murder? What if the person the seller sells his drugs to later kills someone while impaired, does the seller get charged with murder too?
What are the limits to this new form of murder? Is there a limit to the degrees of separation?