Its a pretty interesting concept. I like it a lot. I loved the idea of randomly generated levels, it was nice. I would have loved if there were more difference in the characters (you have civilian, police officer and player). For instance, in one of my cases the evidence pointed at someone from the church, but the criminal was just a civilian. It would have been great if he had a different sprite to make it seem like someone from the church.
Overall, Impressive work. a random level generator that works well is not an easy task, Great Job :D