On July 6, 1985, Diane Suzuki disappeared. She was 19 years old.

Forty years later, she remains one of Oahu's most infamous missing person cases.

Thousands of people dedicated thousands of hours searching, but the case went cold, not because there wasn't a suspect, but because there wasn't enough evidence to indict him.

HNN investigative reporter Lynn Kawano pieces together the case, from her mysterious disappearance to the frustrating search to answer to the question:

Who killed Diane Suzuki?