Moku was last seen at a 7-11 store on Kaumana Drive in Hilo, Hawaii at 7:00 p.m. on September 23, 2008. She had wanted to take her two-year-old daughter to the store with her, but her boyfriend convinced her to leave the child behind at home. She has never been heard from again. On October 10, her blue four-door 1995 Chevrolet Corsica sedan was found at the bottom of a 120-foot cliff in Hakalau, Hawaii. The vehicle had extensive damage and its license plates, Hawaii plates numbered HTN-328, were missing. Police used the chemical Luminol to check it for blood and other body fluids, but they didn't find anything, indicating no one was inside the car at the time of the crash.

Moku left behind three children. She's described as a dedicated mother who wouldn't have abandoned her family. She has never run away before, and her family doesn't believe she would become suicidal even without her medication. The circumstances of her disappearance are unclear and her case remains unsolved.