War of words between Detroit firefighters union president and Police Chief Craig far from over

Police Chief James Craig says he opened a criminal investigation into the firefighters' union president after sensitive information about a witness in a murder case was posted by President Mike Nevin on the union’s Facebook page.   Nevin says he did nothing wrong and if he’s prosecuted, so be it. This goes back two weeks when Detroit firefighters were sent on a call on the west side that ended up being murder.