I can only think that your local police are 'for some reason' looking the other way on this persons actions.
If it is truly as you represent, it would clearly be a violation of the following Hawaii Revised Statutes:
"§712-1226 Possession of a gambling device. (1) A person commits the offense of possession of a gambling device if the person manufactures, sells, transports, places, possesses, or conducts or negotiates any transaction affecting or designed to affect ownership, custody, or use of any gambling device, knowing it is to be used in the advancement of gambling activity which is not social gambling.
(2) Possession of a gambling device is a misdemeanor.
§712-1228 Gambling offenses; prima facie evidence. (1) Proof that a person knowingly possessed any gambling record specified in sections 712-1224 and 712-1225 or any gambling device in section 712-1226 is prima facie evidence that the person possessed the record or device with knowledge of its contents and character.
(2) In any prosecution under this part in which it is necessary to prove the occurrence of a sporting event, a published report of its occurrence in any daily newspaper, magazine, or other periodically printed publication of general circulation, shall be admissible in evidence and shall constitute prima facie evidence of the occurrence of the event.
§712-1230 Forfeiture of property used in illegal gambling. Any gambling device, paraphernalia used on fighting animals, or birds, implements, furniture, personal property, vehicles, vessels, aircraft, or gambling record possessed or used in violation of this part, or any money or personal property used as a bet or stake in gambling activity in violation of this part, may be ordered forfeited to the State, subject to the requirements of chapter 712A."
It would appear that Hawaii doesn't have 'county sheriffs' as most other states, and the next 'higher' department would be the state police. You might even consider contacting them since it MAY be that the local PD has an 'interest' in these activities.