INSIDE the locker of a narcotics cop, Philadelphia police officials recently made a shocking discovery: A cartoon of a man, half as an officer in uniform and half as a Klansman with the words: "Blue By Day - White By Night. White Power," according to police officials. The officer, Scott Schweizer, who has arrested countless drug suspects in predominantly African-American neighborhoods, was removed from his undercover police duties and given a desk job earlier this month, authorities said. The disturbing find triggered an internal probe that widened yesterday as investigators began to explore whether the scope of the case is...