KEY LARGO, Fla. – The Monroe County, Florida, Sheriff's Office reported John Marshall, 71, of Johns Creek, was aboard a 25-foot private vessel July 24 with nine others near the Carysfort Lighthouse, about 6 miles off Key Largo.
The group was snorkeling shortly after noon, says Sheriff's Office spokeswoman Becky Herrin. Marshall was swimming back to the boat. When next members of his group saw him, he was face down in the water.
They pulled him into the boat. Another boat nearby happened to have a doctor aboard, and the doctor switched boats and started cardiopulmonary resuscitation on Marshall, Herrin said.
But it was not successful.
The Florida Fish and Wildlife Conservation Commission also responded with a boat, and took Marshall to shore at Ocean Reef in North Key Largo, where he was pronounced dead.
An investigation continues and an autopsy will be performed to determine the cause of death.