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Jarrett Parker was a psychiatrist of Slabside Maximum Security Prison who secretly conducted unethical experiment on his patients.

Jarrett Parker worked on Level 2. When Oliver Queen was relocated there, he constantly attempted to make him desist from being Green Arrow by calling him Prisoner 4857 and torturing him. Oliver and Talia al Ghul joined forces to fight him, while Laurel Lance of Earth-2 and Felicity Smoak exposed his crimes.[1]

He was killed by Talia while he was entering his car.[2]


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Green Arrow Villain(s)
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This character is or was primarily an enemy of Green Arrow, or his supporting cast including Black Canary and Team Arrow. This template will categorize articles that include it into the category "Green Arrow Villains."

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