Johnson's injuries were treated and by the time he was returned to the police station, some four thousand people had gathered outside.  Inside the station, Malcolm X and an attorney were making bail arrangements for two of the Muslims. Johnson was not bailed, and police said he could not go back to the hospital until his arraignment the following day.  Considering the situation to be at an impasse, Malcolm X stepped outside the station house and gave a hand signal to the crowd. Nation members silently left, after which the rest of the crowd also dispersed.  One police officer told the New York Amsterdam News: "No one man should have that much power. " Within a month the New York City Police Department arranged to keep Malcolm X under surveillance; it also made inquiries with authorities in other cities in which he had lived, and prisons in which he had served time.  A grand jury declined to indict the officers who beat Johnson. In October, Malcolm X sent an angry telegram to the police commissioner. Soon the police department assigned undercover officers to infiltrate the Nation of Islam.