A federal appeals court is being asked to reconsider its decision to remove a judge from the stop-and-frisk case.
Judge Shira Scheindlin's lawyers officially filed the appeal papers Monday.
They say that last month's decision by a three-judge panel to remove her was "unprecedented and procedurally defective."
The Bloomberg administration is arguing that all of her rulings on stop-and-frisk should be thrown out.
She ruled the practice unconstitutional, and said that an independent monitor should oversee efforts to reform the New York City Police Department.
Mayor-elect Bill de Blasio is promising to drop that appeal when he takes office.