He is silent no more. NYC Mayor Bill de Blasio has lashed out about Sunday’s protest in which hundreds of police officers turned their backs on him at a funeral. “I can’t understand why anyone would do such a thing in a context like that,” he said, ending weeks of silence. The feud and resulting “work stoppage” has seen a 54 percent drop in arrests. Last night, two NYPD cops investigating a robbery were shot and wounded, heightening awareness of the risks they face.