Somehow, although I am as historically aware as most Americans can be expected to be, I never knew until this morning that the FBI tried to get MLK to kill himself. The intense surveillance they deployed against him gave them a wealth of knowledge about his actions that they used to assemble this letter, which is disturbing but not surprising. That a police agency would attempt to fool one of its citizens into committing suicide is both horrible and shocking.
Of course, the FBI is only partially a police agency; they also think of themselves as a counterintelligence service. That is an inadequate excuse.