In 2007 five tourists died while scuba diving in the Cayman Islands but investigations of those fatalities have still not been completed.

http://www.cdnn.info/news/safety/s080131a.html
CNN.info -
GEORGE TOWN, Cayman Islands (31 Jan 2008) — The body of another tourist who disappeared while scuba diving in the Cayman Islands has been recovered...
Police said the scuba diving accident is under investigation, however, authorities acknowledge that long delays of up to two years compromise the safety of tourists who scuba dive in the Cayman Islands...
The latest scuba diving fatality was the second in the Cayman Islands in a little over a week.
On January 19, British tourist Tina Baxter drowned while scuba diving off Northwest Point with an unidentified local dive boat operator...
Once considered the best Caribbean scuba diving destination, the Cayman Islands is now synonymous with overdevelopment, exorbitant rates and lowest common denominator tourist trap gimmicks such as Stingray City where local dive boat operators harass marine wildlife to "entertain" cruise ship tourists...