A man who is a mentor and kenpo coach to Leeward Oahu youth is facing an accusation that he molested a boy after plying him with alcohol.

An Oahu grand jury returned an indictment Wednesday charging James Vinano with third-degree sexual assault.

State Circuit Judge Richard Perkins set bail at $50,000.

Deputy City Prosecutor Vickie Kapp told Perkins that Vinano gave the boy straight vodka and a mixed drink that was 30 percent alcohol, and encouraged the boy to drink shots of alcohol at a party in March 2011. The boy got tired and asked Vinano to take him home, Kapp said.

On the way, Vinano stopped at Ewa Beach Community Park, where he molested the boy in his vehicle, Kapp said.

She said the boy told investigators Vinano may have also been molesting another boy.