He should get a lawyer. I assume that he has insurance so if that is the case the insurance company normally will provide a defense.
This is not a workers compensation question, but more of a personal injury issue so I will change your category to get some other answers from personal injury attys in Calif.
I would talk to a personal injury attorney there in Glenwood. call Don Kaufman and he will help or give you names. The family probably has insurance that might cover the judgement so a good attorney wil be able to advise you on the benefits/risks or going forward.
Settlement in Colorado is based on a number of factors that usually have to do with what the insurance company thinks they will have to pay. I would urge you to talk to a workers compensation atty to have them evaluate your case. I can give you the name of someone there or discuss it with you if you want.