On March 28, 2012 while diving Santa Rosa, Cristina Cassin fails to surface during an aborted dive. Currents have gotten strong and the dive was aborted. Upon surfacing, Cristina was not with the group. A call over the radio was made. Search and recovery is still occuring at this time.
Here is the english translation for the link below.

COZUMEL, March 28. – He lost a foreign tourist who was diving on the reef of Santa Rosa. The woman was with a group of divers when he made the sign that was to emerge to the surface, which he did, however, when the group ended the tour and got into the boat that carried them, the crew noticed that she was not .
Escalante Genaro Medina, chief officer of Federal Maritime Ward (Remafe) of the Port Authority, announced that the tourist by the name of Cristina Cassin, 49, is an American, arrived in the island …