The 19-year-old suspect in Sunday's stabbings on Koko Crater trail made his first court appearance yesterday and had a preliminary hearing set for Monday.

Benjamin Davis, of Kalihi, entered no plea on the charges of one count of first-degree attempted murder and two counts of second-degree attempted murder. Bail was set at $100,000.

Davis, wearing a blue hospital-type top and bottom, was escorted into District Court in handcuffs and leg shackles. He wore socks, but no shoes.

Davis had a bandage on this left hand that covered his left pinkie finger.

Following Davis' brief court appearance his attorney, Deputy Public Defender Debra K. Loy, declined to talk to reporters and said she would not try the case before the media.

Davis was arrested Sunday night by the side of the crater following the attacks on two hikers, Guy Tanaka and Nicholas Iwamoto, according to a police affidavit.

Davis was found naked except for a black sneaker on his left foot and a black sock on his right foot, according to the affidavit.

"I want to turn myself in. I'm done," David told police, according to the affidavit.

Officers approached Davis and told him to raise his hands above his head when Davis replied, "I don't have anything in my hands," according to the affidavit. "I dropped the knife on the mountain. I'm not armed. I don't have anything in my hands."

Davis was taken to Castle Medical Center for a mental evaluation but a psychiatrist, and a physician concluded they had no reason to hold him so he was released into police custody.

Tanaka and Iwamoto independently identified Davis in photo line-ups as the man who attacked them, according to the affidavit. Tanaka told police he did not know Davis and that the attack was unprovoked.

Tanaka told police that he was at the helicopter landing pad atop Koko Crater's abandoned tramway about 3:18 p.m. Sunday when he was attacked by a man armed with a folding knife with a 4- to 5-inch blade.

His attacker had a blank expression, Tanaka told police.

When he saw the knife, Tanaka tried to run toward the crater's edge but was stabbed in the left side of his back, according to the affidavit. Tanaka did not realize at first that he had been stabbed.

Witnesses later spotted Iwamoto in a ravine calling for help. Iwamoto suffered 11 stab wounds to his scalp, face, neck, chest, hands and abdomen. Iwamoto also suffered skull and neck fractures, a liver laceration, diaphragm laceration, damage to the esophagus and a collapsed lung, according to the affidavit.

Iwamoto's facial cuts will leave "permanent disfigurement," according to the affidavit.

At The Queen's Medical Center, Iwamoto underwent emergency tracheotomy surgery and a Queen's doctor told police that Iwamoto would have died without treatment.

Although Iwamoto identified Davis in the photo line-up, because of his injuries he has been unable to give police a statement about the attack.