I'm sure these guys were pretty much the equivalent of the Dixie Mafia in the south. They probably got caught or died out the same way. Were they called "The Company" by any chance? I think they were connected more to Asian crime like the Triads or maybe Yakuza, I'm not too familiar with them.

There are other criminal groups in the islands like the Bandidos Mc. I'm sure the Hell's Angels have a presence there as well.

I would assume there would be some kind of cartel involvement nowadays using Hawaii as a jump off point to ship drugs and weapons to Australia and Asian countries, but that's just my opinion.