If that's true, then I think you need to follow up with the authorities, i.e., by sending your website to the California state Department of Justice, which has the authority to investigate these matters, or else to the consumer protection agency.

Unfortunately, there have been a great many scams like this in the past 4 years and this guy may have just slipped through the cracks as a result of staff cutbacks.

The authorities will likely be grateful to you for any assistance you can provide them, i.e., by helping them locate other victims.