I am so sorry for your loss.  I know that this must be a very difficult time in your life.  But unfortuantely I do not think that you will be able to get a copy of the report without a court order, and I see no basis for you to obtain a court order allowing it.  His parents are the next of kin that are legally entitled to it.  Had you been married then you would have been the next of kin legally entitled to the reports and his parents would have been left out in the cold as they have done here.  But give them time.  Losing a child is, in my opinion, the greatest heartache in a parent's life.  Maybe they just need time to digest the information, process it and come to a place of peace where they can openly discuss it.  The information will always be there in black and white.  Emotions are not black and white.  Good luck to you all.