In June 2023, PJI co-sponsored and participated in International Best Practices for Investigating Gross Human Rights Violations and Crimes against Humanity in Tarhuna as part of Transitional Justice, a workshop convened by the Office of the High Commission for Human Rights and the United Nations Support Mission in Libya.

This closed workshop was aimed at bridging capacity for local professionals investigating international crimes committed in the Tarhuna area. The UN Independent Fact-Finding Mission on Libya (IFFM) previously found that between 2015 and 2020, the al-Kaniyat militia ruled this Libyan town through a campaign of terror and intimidation, primarily targeting those they perceived as opposition or a threat. The IFFM found reasonable grounds to believe that members of the al-Kaniyat militia committed a number of crimes against humanity through underlying acts of murder, extermination, imprisonment, torture, persecution on political grounds, enforced disappearance and other inhumane acts, and war crimes.

PJI joined expert panels on the international criminal law framework and investigating crimes against humanity, case prioritization to best serve victims and survivors, and adopting a victim-centered approach to documentation. PJI also participated in group discussions of case studies and recommendations for next steps. Additional co-sponsors and participants in the workshop came from the International Center for Transitional Justice (ICTJ), the International Commission on Missing Persons (ICMP), and the Forensic Anthropology Foundation of Guatemala (FAFG).