The truth about the truth was it was a lie. This is what got Mr Black killed in the library with the revolver by Colonel Mustard, at least this is what Miss Scarlet would like you to believe.
You see murder, the perfect murder, is not about a lie but a truth hidden away where no one can find it, and that is what got Mr Black killed in the study with the rope by Reverend Green, at least that is what Miss Scarlet would like you to believe.
While Mr Black could not care less in the sunny Bahamas.