A self-described Satan worshipper pleaded not guilty to second-degree murder and weapons charges in the vicious stabbing death of a New York City radio newsman.

John Katehis, 16, was ordered held without bail after his arraignment Wednesday night in Brooklyn.

Katehis told police that he was answering an online ad offering $60 for rough sex. The victim, George Weber, was stabbed at least 50 times.

Investigators told the New York Post that the knife sliced through Weber's neck, back and torso so many times that it was difficult to get an accurate count by the time the body was discovered two days ago.

On Katehis' MySpace page, he describes himself as an "extremist" and "sadomasochist" and has photos of himself posing with knives.

Katehis' lawyer, Herbert Moses, said his client was being used by an older man. He says details about their relationship will emerge later.

Sources told the Post that Weber often hooked up with men he met on Craigslist.

Weber worked for 12 years as an on-air reporter at WABC radio in New York. He also had worked at stations in California, Colorado and Pennsylvania.

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The Associated Press contributed to this report.