. ♪ reporter: this is a photo of keto with his former trainer alexis hernandez. s mother says alexis always had a special connection to animals, and that he was considered the most experienced orca trainer at the loro parque. until december of 2009, when something happened that his mother still finds hard to grasp. keto attacked and killed alexis, his trainer. but that only became public knowledge much later. mercedes hernandez: [speaking spanish] in its line of business, the park had no interest in saying what really happened, namely, a brutal orca attack because that would have had a negative impact on visitor numbers. so they played it down, claiming that it was the fault of the trainer, not the orca. reporter: yet the autopsy report clearly states that alexis hernandez's body displayed shark bites and internal injuries. but to this day, the marine park's owner won't call it an orca attack. wolfgang kiessling: [speaking german] how do i explain it? it was an accident. accidents happen, i can't say more than that. but the animal is still with us today. the anima