Zoo staff began surveillance of his enclosure to try to catch him in the act, only to find that he seemed to be aware that he was being watched. This forced zookeepers to go "undercover", posing as tourists to learn Ken Allen's escape route, but the ape was not fooled.
To capture him in the act, zoo staff began monitoring his enclosure; however, they found that he seemed aware of being watched. This compelled zookeepers to adopt undercover tactics, posing as tourists to learn Ken Allen's escape route, but the ape was not fooled by this deception.