Kerik will be forced to await his upcoming corruption trial behind bars. Judge Stephen Robinson found probable cause to believe he was in contempt of court and revoked his $500,000 bail.
His lawyers said they did not know if Kerik, who has been New York City's correction commissioner as well as police commissioner, had ever spent a night behind bars.
The judge said he could not find another way to keep Kerik, 54, from trying to contaminate witnesses and the potential jury pool.
``Mr. Kerik, if left to his own devices, will obstruct justice,'' the judge said. ``My fear is that he has a toxic combination of self-minded focus and arrogance, and I fear that combination leads him to believe that his ends justify his means.''
``Mr. Kerik's not special,'' the judge said at another point. ``He thinks he is.''
Kerik, who wore a suit to court, took off his tie, emptied his pockets of wallet and keys, removed a ring and gave them to a lawyer, then walked off in the custody of two marshals. He did not speak.
The U.S. Marshals Service said he would be taken to the Westchester County jail in Valhalla.
Defense attorney Barry Berke said he would appeal the ruling and seek a stay. Robinson denied a request to keep Kerik out of jail pending the appeal.