T.M.
Sometimes the truth can leave emotional scars and deep wounds that never heal. Knowing the truth or which version of the truth does not change the fact that you are his mother, his dad passed and you and his dad were not married. Your making decisions that may or may not alter your son's life for the rest of his life. What purpose does it serve to rehash the cause of death at this point in time? I would not continue to search for answers that can't change anything but I would protect my son with my whole being and spare him any further hurt that can come out of knowing the truth now or in the future.