SAO PAULO, Brazil (Reuters) - The zoo in the Brazilian city of Sao Paulo is facing a murder mystery worthy of an Agatha Christie novel.
Since late January, the zoo, one of the most modern in Latin America, has lost 10 animals, including an elephant -- fatally poisoned by what police are calling a "serial animal killer".
So far, laboratory tests have shown the animals were killed with sodium fluoroacetate, a banned rat poison.
