I can appreciate that you believe in reincarnation, that doesn't make it a fact or real.
But because it is based on your beliefs, nothing I can say will help. I can't comprehend believing that the actions of a living person prevents the soul of anyone from making the trip they are designed to make, but if you believe that is so, then, again, nothing will help you until you are ready to let go and can stop feeling like you are holding him back.