DETROIT — The Michigan Supreme Court on Tuesday sent the involuntary manslaughter case of the parents of accused Oxford High shooter Ethan Crumbley back to the Court of Appeals to consider whether there was sufficient evidence for James and Jennifer Crumbley to stand trial. The Michigan Court of Appeals in September rejected the appeal filed by attorneys for James and Jennifer Crumbley that requested a stay on their case and for some evidence, including their son’s journals and text messages, be considered inadmissible in the case against them in Oakland Circuit Court. “This is a big deal beca…