Robert’s family: I'm so sorry for your loss. I went through a similar situation and I was very helped by the hope that I found in the Bible in John 5:28, which says, "Do not amazed at this, for the hour is coming in which all those in the memorial tombs will hear his voice and come out". I am sending you a link with more information on this hope.
https://www.jw.org/en/publications/magazines/awake-no3-2018-nov-dec/
My deepest sympathy to the entire family for your loss. As the days continue to pass, I hope you find comfort and support in the people that surround you and the wonderful memories you carry in your mind and in your heart. May the words of 1 Peter 5:7 “ while you throw all your anxiety on him, because he cares for you” bring the entire family comfort and strength. Please accept my sincere condolences.