Evan Lee Hartley is a recurring character in Zoo. He was a death-row in prison for murder, but escaped with the help of a pack of wolves. He serves as the primary antagonist from the episode The Silence of the Cicadas to This is What it Sounds Like.
Evan Lee Hartley worked in a biology lab at the Washington University until 2008.
He was an upstanding citizen with no criminal background until one day, for no apparent reason, he stabbed an entire hunting party to death in the Pearl River Woods. Evan Lee was caught before he could continue with his killing spree.
At an unknown period of time he met professor Robert Oz.