A 54-year-old Handi-Van driver sexually assaulted his 24-year-old passenger last month in Waipahu, police said.
The woman has a mild mental handicap, police said.
She reported her Handi-Van driver touched her inappropriately the afternoon of April 19.
Officers found the man about 9:40 a.m. yesterday and arrested him on suspicion of third-degree sexual assault.