diane,
i'm not a fan of parochial schools, but in mat's case i make an exception and agree with dj. i believe that a suppotive christian school with a supportive minister might help matt. for what it's worth, years ago my oldest granddaughter was having behavioral problems. our daughter sent her to a christian school for a year (i wish it had been longer - but i'm only a grandparent and refuse to tell our daughter how to raise her children). it helped straighten our granddaughter out. i can't argue with success.
have you considered home schooling? i know that it can be very trying, especially with someone like matt, but it may help re-bond the two of you.
i know that this is hard on the two of you. i wish there were more i could do. you and matt are uppermost in my thoughts.
warren