But the whole case comes down to: "A tiger (which had mauled someone the year before) escaped from a facility that was inadequate to start with".
The tiger has an early history, too:
"Even as a cub, Tatiana was noted for her "quick tempered" personality compared to her more mellow siblings".
And atleast one of the "kids" has a record proving that he is "quick tempered" and probably less intelligent than his fellow human beings who manage to go to the zoo without being attacked by the animals there.