--David Mattingly, 360 Correspondent
The 911 tapes in the tiger attack at the San Francisco Zoo will probably play a role in future lawsuits but they don't answer a central question in this tragedy: what prompted the Siberian tiger to want to escape its enclosure?
Police found no solid evidence the tiger was being taunted before the attack. But tiger experts continue to say something had to trigger the animal to leap a dry moat and bound over a wall to attack the young men.
A zoo spokesman says employees found a branch and pine cone and a nine-inch rock inside the tiger enclosure that had no reason to be there.
The enclosure's wall was obviously inadequate. The tiger should never have been able to get out. Animal behavior experts add that the tiger shouldn't have wanted to, either.
Only three people knew exactly what happened that day, and one of them did not survive. The other two say they did nothing wrong.