The decision came after a Police Department administrative trial in the fall found that the detective,
Gescard F. Isnora, had acted improperly in the shooting that killed Mr. Bell on what was supposed to have been his wedding day and that he should be fired.
There was nothing in the record to warrant overturning the decision of the departments trial judge, Deputy Commissioner Paul J. Browne said on Friday night.
Law enforcement officials said word of Police Commissioner Raymond W. Kellys decision came late Friday. Detective Isnora, an 11-year veteran, will not collect a pension, one official said. He loses everything, the official said.
