You can run a free search on the AG's sex offender registration page: https://sexoffenders.ehawaii.gov/sexoffender/welcome.html;jsessionid=194A49DB8AD62B0DA8EC62C6A0015645.hcjdcapp
If you search by name, it should pop up with a photo of the offender, and under "offenses," a description of the offense and a copy of the court's judgment of conviction.