The Working Group on Arbitrary Detention - Members



Ms. Leigh Toomey (Australia), appointed in 2015

Ms. Leigh Toomey Ms. Leigh Toomey (Chair-Rapporteur) holds an LL.M. from Yale University where she studied human rights law as a Fulbright scholar. She provides expert advice in the design, implementation and evaluation of human rights and development projects, particularly monitoring of places of detention, improving access to justice, supporting national human rights institutions, and building the capacity of police, prosecutors, judges, lawyers and corrections officers. Her experience includes extensive field-based work in developing, conflict and post-conflict settings worldwide for UN agencies, NGOs, academic institutions and development organisations. Ms. Toomey has taught human rights and criminal justice reform at Queensland University of Technology and for the Raoul Wallenberg Institute of Human Rights and Humanitarian Law. She is qualified as a Solicitor in England and Wales and a Barrister in Australia. Ms. Toomey was appointed to the Working Group on 1 August 2015. Since April 2016, she has served as Vice-Chair on Follow-Up, including initiating a new follow-up procedure from August 2016 in Working Group opinions, and strengthening the referral mechanism to share findings in opinions with other relevant Special Procedures mandate holders.


Ms. Elina Steinerte (Latvia), appointed in 2016

Ms. Elina Steinerte Ms. Elina Steinerte (Vice-Chair)has a Ph.D. from Robert Gordon University, Aberdeen and has taught public international and human rights law at numerous universities in Latvia, the United Kingdom and the Bailiwick of Jersey. The prime focus of her work and research, through the University of Bristol Human Rights Centre, has been the implementation of the United Nations Convention against Torture and its Optional Protocol (OPCAT). She has worked worldwide with respect to the implementation of the Convention including advising upon the calibration of domestic legislation and the designation and effectiveness of National Preventive Mechanisms. Additionally, she has provided expert advice on a variety of criminal justice reforms concerning pre-trial detention, overuse of imprisonment, overcrowding and independent oversight over the places of deprivation of liberty. Recently she has been working with the UNHCR on streamlining its methodology for monitoring immigration detention. Until 2016 she was an expert member of the inaugural Council of Independent Experts on International and European Law to the Minister of Foreign Affairs of Latvia. Ms. Steinerte became a member of the Working Group on 1 November 2016.


Mr. Seong-Phil Hong (Republic of Korea), appointed in 2014

Mr. Seong-Phil Hong Mr. Seong-Phil Hong teaches international law, human rights, and ethics in investment at Yonsei Law School as an Associate professor while also leading the Asian Law Center. He serves as an expert member of the Asian Council of Jurists of the Asia Pacific Forum, the collectivity of the NHRIs in the region. He has worked as a conciliator for the ICSID under the World Bank. On the human rights campaign front, he has been actively engaged in the advocacy activities, over the last 20 years with focus on such issues as the North Korean human rights and the WW II enforced sexual slaves, while also touching upon those of the responsibility of multinational enterprises and the legal redress for historical injustices. He was appointed to the Working Group in May 2014.



Mr. Mumba Malila (Zambia), appointed in 2020

Mr. Mumba Malila Mr. Mumba Malila holds a Doctor of Laws degree (LLD) in Human Rights from the University of Pretoria and LLM degrees from Cambridge and Cumbria universities. He is presently a judge of the Supreme Court in Zambia. He previously taught law at the University of Zambia. He was once Chairperson of the Zambian Human Rights Commission during which time he among other things undertook country-wide visitation of prisons and other places of detention in Zambia and engaged authorities to improve conditions of detention. He later served twice as Attorney General of Zambia. He also served as a Member and subsequently as Vice Chairperson of the African Commission on Human and Peoples’ Rights. He was Special Rapporteur on Prisons and Conditions of Detention in Africa for four years. He took up membership of the Working Group on 1 November 2020.


Dr. Miriam Estrada-Castillo (Ecuador), appointed in 2020

Mrs. Miriam Estrada Dr. Miriam Estrada-Castillo is a Professor of International Law, International Criminal Law and Human Rights and the Director of the UNESCO Chair at Casa Grande University, of Guayaquil, Ecuador. She is also a Visiting Professor at Bards College (NY/Palestine). 

Professor Estrada worked for the United Nations Security Council Counter-Terrorism Committee Executive Directorate (CTED) and as an International Prosecutor at Timor-Leste being part of the first 100 Brahimi Civilian Experts deployed in a Peacekeeping Mission by the UN. She is a former Vice chairperson of the Committee for the Elimination of all Forms of Discrimination against Women (CEDAW) and member of the group which drafted the CEDAW Optional Protocol.

Dr Estrada was the Latin America Regional Adviser on Gender, Human Rights and Culture of Peace for UNESCO. 

She has been Visiting Professor, and International Leading Expert on Human Rights at the Raoul Wallenberg Institute of Human Rights and Humanitarian Law (RWI). Professor in Residence at the UN University for Peace and at the Australian National University. Former Minister of Social Affairs and a Former President of the National Court for Minors in Ecuador. She is the author of the Children’s and Family Law of her country and is known as the founder of the Human Rights Education on Ecuador. She has written profusely about Human Rights, Gender and Civil and Political Rights.