Probe into deadly tiger attack

Police radio transcripts from the night of a deadly tiger attack revealed a chaotic scene at the San Francisco Zoo as zookeepers struggled to sedate the animal and medics refused to enter until they knew they would be safe.

Zoo employees also initially questioned whether early reports of the Christmas Day attack were coming from a mentally unstable person, according to an 18-page log of communications from police dispatchers to officers and emergency responders at the scene.