KAILUA-KONA, Hawaii (KHON2) — Duncan Mahi, the man charged with kidnapping a Big Island teenager in September, appeared in court on Thursday morning.

Court documents, released after Mahi’s arrest, told of the frightening 22 hours that the teen was held captive.

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According to court documents, Mahi threatened the teen and her boyfriend with a knife, and forced her to “restrain” her boyfriend before she was abducted from the beach.

Court documents said the teen recounted being shackled and kept inside a yellow bus behind Mahi’s home and being forced to smoke methamphetamine.

The teen returned to her family after a dramatic rescue at a Hilo restaurant the day after the abduction.

A worker at the restaurant recognized the teen and pulled her to safety. Mahi, who was 52 at the time, fled but was tracked down and arrested hours later.

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Mahi is charged with kidnapping, robbery, terroristic threatening and meth trafficking in connection with a series of incidents that occurred. Not all charges are mentioned due to the privacy of the victim.

Prosecutors are seeking an extended term of imprisonment for which Mahi would serve a life term as a result of his two prior felony convictions for terroristic threatening.

Thursday’s appearance was to set an evidentiary hearing regarding mental fitness, which was set for April 14.