The Autobiography of Malcolm X

According to Malcolm's associates, he repeatedly requested police protection in the weeks prior to his assassination and was not taken seriously.

From the text:

Deputy Police Commissioner Walter Arm's statement that Malcolm X refused police protection conflicts directly with the statements of many of his associates that during the week preceding his assassination Malcolm X complained repeatedly that the police would not take his requests for protection seriously. Finally, although police sources said that a special detail of twenty men had been assigned to the meeting and that it had even been attended by agents of the Bureau of Special Services, these men were nowherein evidence during or after the assassination, and Talmadge Hayer, rescued from the crowd and arrested as a suspect immediately after the assassination, was picked up by two patrolmen in a squad car cruising by.