He's admitted on national television to 'pulling the feeding tubes' on both his parents. I wish I had more information about the father's, because I think that was post-Felos and I have a vague recollection that Michael's father didn't like what Michael was trying to do to Terri (the father died in 2001 IIRC).
Yes, The Empire Journal has a slew of information about Greer rulings on other cases, as well as other people coming forward.