How is that new information? Appeals are available, but very costly and you truly need new evidence. You can certainly discuss it with an experienced appellate attorney to see what can be done.
There is a lot more going on here than you are telling us. As my colleagues have pointed out, this does not seem to be new evidence. But beyond that, the first thing a lawyer would need to know is the complete procedural history of this case. If you are serious about pursuing this you will need to have an appellate attorney from Michigan review and evaluate the case to give you an opinion as to what might be possible. The evaluation itself would be a major, and probably a somewhat costly, project.