Not proven

from The Collaborative International Dictionary of English v.0.48

Proven \Prov"en\, p. p. or a.
   Proved. "Accusations firmly proven in his mind." --Thackeray.
   [1913 Webster]

         Of this which was the principal charge, and was
         generally believed to beproven, he was acquitted.
                                                  --Jowett
                                                  (Thucyd. ).
   [1913 Webster]

   {Not proven} (Scots Law), a verdict of a jury that the guilt
      of the accused is not made out, though not disproved.
      --Mozley & W.
      [1913 Webster]