The animal's previous owners were denied their request to reclaim him.
Police are investigating a complaint from the governor of the local Samanco district, who said the sea mammals had been poisoned.
The agency looks to the public for help locating nine fugitives suspected of committing serious environmental crimes.
A group of judges could decide whether Tommy the chimp should be recognized as a person by law.
The death is the third giant lizard to perish this year at zoo infamous for hundreds of animal deaths.
The animal died from head injuries while being transported, blindfolded, in an open truck, an animal welfare agency said.
As many as 10,000 dogs may be slaughtered for food over the 10 days of the event.