Source : Webster's Revised Unabridged Dictionary (1913)

Exculpate \Ex*cul"pate\, v. t. [imp. & p. p. {Exculpated}, p.
   pr. & vb. n.. {Exculpating} (?).] [L. ex out + culpatus, p.
   p. of culpare to find fault with, to blame, culpa fault. See
   {Culpable}.]
   To clear from alleged fault or guilt; to prove to be
   guiltless; to relieve of blame; to acquit.

         He exculpated himself from being the author of the
         heroic epistle.                          --Mason.

         I exculpate him further for his writing against me.
                                                  --Milman.

   Syn: To exonerate; absolve; clear; acquit; excuse; vindicate;
        justify.

Source : WordNet®

exculpate
     v : pronounce not guilty of criminal charges; "The suspect was
         cleared of the murder charges" [syn: {acquit}, {assoil},
         {clear}, {discharge}, {exonerate}] [ant: {convict}]