I'm so sorry to hear this news, Isis. I am sure your guy and his daughter must feel that the pins have been knocked out from under them with this unexpected and unwelcome event.
My prayers for them are for comfort, healing, and peace at a time when all three can seem so far away. Until the pain and shock of this loss begin to feel even a little less overwhelming, all of you can rest in God's care, knowing that He knows exactly what you are going through. He even has the power, through His love, to turn this terrible thing into something redeeming and comforting for each of you, because He is God of good and life, not evil and death.
For today, though, His arms are open and can provide the solace that nothing else can. I am truly sorry for this loss.