He had planned to go cruising out on Lake Michigan. His truck and empty boat trailer were found at a marina in Milwaukee. Scuba gear with his identifiers on it washed ashore in state of Michigan. There was no sign of Dr. Black or his 18-foot boat and he has never been heard from again. At the time of his disappearance, he was an ophthalmologist, he was also an experienced scuba diver, diving for 25 years at the time of is disappearance, he is considered to be lost at sea. (Information retrieved from NamUs.gov)