Sequoya Rebecca Vargas was 16 and preparing for her junior year at Pahoa High School when she vanished on August 22, 1993. She told her mother she was spending the night with a friend; the two were hitchhiking and were picked up by a man identified as Richard Damian Serrano. After dropping off Sequoya’s friend, Serrano took Sequoya to a house in Nanawale Estates where Matthew Gibbs and Jason McCubbins were present. That was the last confirmed sighting of her.

A month after her disappearance the case was reclassified as a homicide following a confession by Matthew Gibbs. Gibbs described giving Sequoya alcohol combined with prescription cough medicine until she lost consciousness, then participating in a sexual assault with McCubbins and Serrano. Gibbs said Sequoya was beaten, placed in a car trunk, taken to McKenzie Park and thrown from a roughly 20-foot sea cliff; Serrano allegedly swam her out to sea. Sequoya’s body has never been recovered. McCubbins pleaded no contest to kidnapping and manslaughter, Gibbs pleaded to sexual assault, and Serrano — who left Hawaii after the disappearance and was arrested in Mexico in 1999 — was convicted of kidnapping, second-degree murder and sexual assault. Sequoya’s ex-boyfriend, who was to testify at trial, disappeared before the proceedings; his disappearance has not been officially tied to Sequoya’s case.

Does anyone have information about Sequoya’s last movements or the people seen with her that night?