I'm sure running that red light was not a choice. It was a mistake caused by negligence (which humans make all the time). Unfortunately, this unintentional mistake costed his brother his life. That's enough punishment to deal with. Throughout this guys life people who were not informed of the accident are going to ask: "how's your brother." The grief will replay in his head continually until the day he dies.

/\ the above statement is based on the event being unintentional!