Legal Question in Civil Litigation in California

Only if they are legally liable for something they did that gives you grounds to sue them.

You can't sue them because they have money and related. As MR Nelson so aptly points out they must be liable. Having a deadbeat son is not a cause of action.

You can only sue them for their own actions. Unless their son is still a minor, they are not liable for his actions.

One can only be sued if there is some liability on their part.Unless the parents are in some way liable for some actions taken on their part they are not responsible unless their son was a minor at the time he caused the damages to you. The it may be possible to hold them responsible.

Not unless they are vicariously liable for something he did.