Even Elephants in India that have been more or less domesticated for many century's every now and then just go over the edge and rampage, killing and wounding people.
Its a wild animal, and a dang smart one, and an apex predator.
You would never get me in the same tank with one. Watch from outside with awe and drool yes. Climb in with it, sorry, but my self preservation instinct kicks in right about there.
From what I've seen, heard, this particular animal has had issues in the past. Either release it to the wild, or put it out of its misery. It certainly can never be trusted.