I lost someone very close to me due to suicide. I didn't think I could handle it, and I was going through a very atheistic period in my life, so I didn't feel there was hope of ever seeing them again. The whole thing was devastating to me and I didn't see how I could go on.
However, that person started leaving little unmistakable signs that they still exist, for me and other family members. It helped us all to get through it. I went from being an atheist to agnostic. I don't have many answers but I know there is more than this life.
It is my hope that you get whatever comfort you and your family needs.