Dr Gideon Boas

Gideon Boas has a broad civil and criminal law practice. He has an extensive personal injury practice, with particular expertise in historical sex abuse cases against various religious institutions and State bodies (appearing in the Supreme Court, Court of Appeal and High Court). He appears in criminal law trials and appeals, including in violent crime, drug, fraud, terrorism, slavery and human traffickng matters. He appears in inquiries and coronial matters, as well as professional negligence and discplinary matters. He also practices in industrial and other civil and commercial areas. He is an expert in evidence law, in which he teaches and is widely published (see, e.g., Bellew, Arthur, Boas and Chifflet, Australian Uniform Evidence Law: Principles and Context, LexisNexis 3rd edition commissioned). Gideon has considerable experience in complex litigation, both in Australia and internationally.  

Gideon has worked as a Senior Legal Officer at the United Nations International Criminal Tribunal for the former Yugoslavia (ICTY), where he led the Trial Chamber’s legal team in the Milosevic case. He has also acted for Radovan Karadzic, accused of genocide, crimes against humanity and war crimes before the ICTY.

Gideon has delivered legal training on criminal and administrative law matters, including to the Victorian Bar, Judicial College of Victoria, Police Prosecutors, Victoria Legal Aid, the Office of Public Prosecutions and the Department of Justice, on the criminal process implications of the Victorian Charter of Human Rights and Responsibilities. He has given expert legal opinion on a range of matters, including in the extradition and human rights areas. He has consulted for a range of government bodies, including the Australian federal government and Victorian government departments, the United Kingdom Foreign and Commonwealth Office, and the United Nations. Gideon has published many books, book chapters and journal articles on criminal law and justice, evidence and procedure, and international law.

Gideon is a Victoria Legal Aid Criminal Trial preferred barrister. He is also an accredited specialist criminal law advocate under the Victorian Bar's Indictable Crime Certificate program.

Gideon is also an Adjunct Professor of Law at La Trobe University.

Some of his select recent and ongoing cases include:

• DZY (a Pseudonym) v Trustees of the Christian Bros, [2025] HCA 16 (leading Dr Kelly and Mr O'Connor).
• Jin Feng (a pseudonym) v The King, High Court Special Leave Application  (leading Dr Kelly).
• CDPP v Charles Daley (a pseudonym); Charles Daley (a pseudonym) v CDPP [2025] VSCA 70 (leading Dr Kelly).
• HM (a pseudonym) v Sister Mary Monoghan [2025] VSC 51, permanent stay application (leading Mr Carolan).
• CDPP v Elijah Falco (a pseudonym) [2024] VSCA 247 (construction of s 271.2(1A) Criminal Code); High Court Special Leave application (leading Mr O'Connor).
• Bird v DP (a Pseudonym), High Court Appeal [2024] HCA 41.
• Danny Zayneh v The King, High Court Special Leave Application  (leading Dr Kelly).  
• Trustees of the Christian Bros v DZY (a Pseudonym) [2024] VSCA 73 (leading Dr Kelly). 
• Pending Supreme Court trials for plaintiff victims of child sexual abuse v Catholic Archdiocese of Melbourne, Society of Jesus (Jesuits), Marist Brothers, Christian Brothers, Salesian Society, Dioceses of Ballarat, Parammatta and others, various Orders of nuns, various Anglican Dioceses, States of Victoria, NSW and Tasmania, various private and public schools in Victoria and elsewhere, and individual perpetrators.
  

• Inquest into the Death of George Diamond, Counsel Assisting the Coroner, Judge Cain, Findings 19 Setember 2024.
• Inquest into the Death of XY, Counsel Assisting Coroner McGregor, Findings 19 June 2024.
• Inquest into the Death of Shane Tuck, Counsel Assisting the Coroner, Judge Cain, Findings 11 December 2023.
• DPP v Poljakovic [2023] VCC 1046.
  
• DPP v Ercan [2023] VCC 898, criminal plea and sentence.
  
• DPP v Poljakovic [2023] VCC 1046, criminal plea and sentence.
  
• DPP v Gheyratmand [2023] VCC 955, criminal plea and sentence .
  
• DPP v Tung Pham [2022] VCC, Ruling excluding Record of Interview pursuant to s 90 Evidence Act; Ruling refusing certification of interlocutory decision sought by Crown.  
  
• Victorian Legal Services Commissioner v Bloom and Chiu (Legal Practice) [2021] VCAT 1088.
  
• Australian Building and Construction Commissioner v Construction, Forestry, Maritime, Mining and Energy Union (The Monash Freeway Widening Case) (No 2) [2021] FCA 1101.
  
• Ibrahim Abbas v The Queen [2020] VSCA 80.
  
• Le v The Queen  [2019] VSCA 80.