A federal inspection less than two months ago found no problems with the zoo's Gorilla World exhibit, but earlier zoo inspections reported issues including the potential danger to the public from a March incident involving wandering polar bears.
Hamilton County Prosecutor Joe Deters' office said Cincinnati police are investigating what transpired with the death of the gorilla named Harambe on Saturday. Afterward, police will talk with prosecutors about whether charges are warranted, the office said.
Some critics have said the boy's parents should be charged with child endangering, while others want the zoo held responsible for the death of the 17-year-old western lowland gorilla. The boy was released from a hospital later Saturday, and his family has said he's "doing just fine" at home.
Tanya Espinosa, a spokeswoman for the U.S. Department of Agriculture's Animal and Plant Health Inspection Service, said today that there wasn't an investigation open yet but that it would be looking into the incident for any violations of the Animal Welfare Act.
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Federal reports viewed by The Associated Press showed an inspector warned the zoo that the public could have been "at great risk for injury, harm or death" on March 16 when two polar bears went through an open den door into a behind-the-scenes service hallway. At the time, zoo officials said some visitors were moved for safety as the bears were returned to their main holding area. No one was injured.
The federal inspection found that two doors were left open by keepers and there didn't appear to be "a formalized method" for double-checking locks and doors.
The report said the zoo's dangerous-animal response team used tranquilizer darts on the two bears. Maynard said yesterday that using tranquilizers on the gorilla likely would have put the boy in greater danger because they don't take effect immediately.