I just wrote this piece for NPR on the murder of Michael Stewart, an aspiring artist and model who was beaten to death by NY Transit Police exactly 30 years ago.  His crime? He was supposedly tagging a subway station wall.  The story includes the horrific details of his death, the injustice that followed, and a broader discussion of hip hop and policing.  I end with the words of his mother, whom I reluctantly contacted (afraid I’d stir up emotions she wanted left alone).  I promised her I’d do my best to get her son’s story out there, and this is the beginning…