A plea hearing for alleged identity thief Jocelyn Kirsch has been postponed tomorrow, the U.S. Attorney's Office said tonight.

Instead Kirsch, 22, a former Drexel University student, will be in court for a formal arraignment of charges and a detention hearing in front of U.S. District Judge Eduardo Robreno. The judge will determine if Kirsch will be detained or released on bail.

Federal prosecutors said last week that Kirsch, who has been living in Novato, Calif., had stolen an acquaintance's credit card in the Golden State. She is also expected in a Marin County court on Monday to face one misdemeanor charge of filing a false emergency report.

Kirsch, who is under house detention after the credit card allegation surfaced last week, is accused by Marin County authorities of making a 9-1-1 call to her former home, resulting in the arrest of her step-father. Those charges against him were later dropped.