University of Miami athlete Austen Everett died from non-Hodgkin's lymphoma in 2012. Her mother said it was soon after that, as she found out about even more sick players, that she came to believe that artificial turf used on soccer fields was the culprit. "I realized, 'Oh my God, the thing that she loved most probably killed her,'" June Leahy told NBC News. "And that was hard." Leahy says since her daughter's death, she still hasn't gotten enough answers — or action from lawmakers and regulators.