erica fisher is live in orlando with the latest on this. a lot of folks shocked, erica. >> reporter: well derek, this is certainly a devastating day for the family of this trainer, as well as this park family dawn was 40 years old with a decade of experience in training killer whales. in fact, she was the top trainer here at sea world in orlando, but sadly, around 2:00 this afternoon, deputies say she slipped and fell into the whale tank and that's when the whale attacked her. now as you mentioned, this whale, tilly has a checkered past and he is the largest in captivity at 22 feet long and more than 12,000 pounds. such a monstrous animal, really. and today we heard that witnesses say he was agitated earlier in the day, trainers actually told audience members that just before deputies say she supposedly fell in, but witnesses tell a different story. take a listen. >> and she watched from underneath that overhang and said hey so and so, we are ready to go. i don't know what that meant. and he was getting a belly rub, because he was upside dow