I found this....
This diver was not with a group getting certified but, in fact, a highly trained diver using Rebreather diving equipment and worked for the New York Aquarium. She was diving with 3 other people when she said she was going to surface and go back to the shore. They don’t know what led to her not making it.
Source: Me. I was there getting my own certification when it happened. It was an awful thing to see.
Very poor judgement if true.