Thank you all for your understanding. The girls spoke to the coroner this week. I have copied the message from his daughter:
"It looks like dad passed away in his sleep peacefully. The autopsy results show no signs of heart attack or aneurysm or cancer and he most likely died of diabetes. It will take months before the toxicology results are back to know more accurately. He also said he'd look in to what dad went to the hospital for. "
I'm so thankful that he was peaceful. Joanne