I'll have a lot more to say about captive wild animals and related issues in the coming weeks and months, but I wanted to point to a recent article by Tim Zimmermann, "Blood in the Water," about the killing of Alexis Martínez by Keto at Loro Parque in the Canary Islands, just two months before Tilikum killed Dawn Brancheau at SeaWorld Orlando.* In it, he refers and links to his article from last year, "The Killer in the Pool." They have a slightly different focus than I do, but I recommend both.
*Tilikum's story is tragic. According to Wikipedia, SeaWorld has put him back to work.