John Heieck

John Heieck

Twitter: @HeieckJohn

John Heieck holds an LLM in Public International Law from Leiden University and a PhD in Law from the University of Kent. He is the author of A Duty to Prevent Genocide: Due Diligence Obligations among the P5 (Edward Elgar 2018), which was the first standalone monograph on the duty to prevent genocide, and which posited that the duty to prevent’s concomitant due diligence obligations imposed, inter alia, a duty not to veto on the permanent five members of the UN Security Council (P5) when there existed a serious risk of imminent genocide. In reaching this conclusion, the book also defined a three-part test by which jus cogens norms may be identified, an exercise which, in the opinion of the author, is sadly lacking in the legal scholarship. John has followed up A Duty to Prevent Genocide with numerous blog posts on the prevention of mass atrocities (here on Opinio Juris), while branching out onto topics more readily applicable to his practice as a criminal defense attorney, such as the encyclopedia entry he co-authored with Kevin Jon Heller on ‘Mistrial: International Criminal Courts and Tribunals’ for the Max Planck Encyclopedia for International Procedural Law (Oxford University Press 2020), as well as others that are currently in the works.