While I understand that you are going through very rough time, be sure you do not sin in your anguish.
Jesus taught us how to pray--He never encouraged or suggested we pray to, or communicate with, people who have physically died.
ShadowAce, you know that I believe our Triune God is the only omniscient one. Therefore, any praying with me at my request would have to present (or on email/text/discussion board) :>) to hear the request. If an angel watches over our little ones, and notices the actions of those who injure the child, then he notices those who ask holy things for the child.