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A dead sea turtle is carried out of the surf by Donald Tillman April 14, in Waveland, Mississippi. Local turtle activists Donald and Shirley Tillman say they have discovered 19 dead sea turtles in Mississippi in the month of April alone and suspect they are dying due to the effects of the BP oil spill. Endangered sea turtles and dolphins are still dying in high numbers in Mississippi, which continues to be impacted by tar balls and weathered oil. There have been 67 reported sea turtle deaths through April 11. April 20th marks the one-year anniversary of the worst environmental disaster in U.S. history.