LOS ANGELES (AP) - Authorities say a man who wore a bulletproof vest on a plane and had weapons in his checked bags had manuals stored on his computer detailing how to kill people and schedules for Japanese schools.

The disclosures came during a court appearance in Los Angeles by suspect Yongda Huang Harris on Friday, during which the judge ordered him held without bond.

Prosecutors say an examination of Harris' computer revealed he had a "strong interest" in sexual violence against girls. One document entitled "Man Trapping" showed how to hunt and trap human beings.

Harris was arrested last week during a stopover in Los Angeles. He's charged with one count of transporting hazardous materials - in relation to a smoke grenade found in his luggage. Authorities say he was also carrying knives, body bags, a hatchet, handcuffs and leg irons.

Defense attorney Steven Seiden says his client "may have interests that are not of the norm, but that doesn't mean he's carrying out any type of harm to anyone."

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