Last year, a police spokesman said that local and federal investigators were reviewing Nordo's conduct for potential criminal violations. He has not been charged with a crime, and the status of that investigation was not clear Tuesday. Attempts to reach him for comment were not immediately successful. It also was not clear whether Anhalt's decision and criticism of Nordo's behavior would reverberate beyond Powell's case. Before he was fired, Nordo — who spent two decades on the force, nearly half of that time in homicide — was known as a prolific investigator often assigned to challenging investigations.