Please find a real example of a serial murderer in history and provide examples from the individual that justifies that they meet the clinical definition of a sadist

Please find a real example of a serial murderer in history and provide examples from the individual that justifies that they meet the clinical definition of a sadist. If you want you may pick a character in a film. That said you MUST fully justify that the individual example meets the clinical definition for sadism. Each assignment response needs to be 1000 words, with APA 7th ed citations and references. Do Not Use MLA or any other form of referencing.