I agree with Vic that it's good to move on and forgive for one's own sake. Especially versus forgiving because some outer force commands (or even just wants) you to. I think the OP is asking that, and it's a good question.
I don't ever hope for pleasant days for somebody who is (rightfully) in prison for a long time. But I do hope that the experience is rehabilitative in a way. If somebody emerges from prison angrier than when he entered because of the surroundings or experiences in prison, then that person is no better for our society once he is released. So in that sense, I am mentally moving on from whatever he did, and hoping he gets the help he actually needs to become a better person (and this is whether or not he is ever released).
I don't ever hope for pleasant days for somebody who is (rightfully) in prison for a long time. But I do hope that the experience is rehabilitative in a way. If somebody emerges from prison angrier than when he entered because of the surroundings or experiences in prison, then that person is no better for our society once he is released. So in that sense, I am mentally moving on from whatever he did, and hoping he gets the help he actually needs to become a better person (and this is whether or not he is ever released).
"For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring." - Carl Sagan
