2006 saw him appointed by the International Criminal Court (ICC) to lead the investigations into the Darfur genocide, in which 300,000 had allegedly been killed.

Faal was later appointed to the position of senior trial lawyer and lead prosecuting counsel for the Darfur cases.

[3] Between 2011 and 2016, Faal served as co-lead defence counsel for a number of cases in the ICC, relating to Kenya, Liberia, Libya, and the Philippines.

[4] Individuals he has defended include Mohammed Hussein Ali, William Ruto, Uhuru Kenyatta, and Francis Muthaura.

He has also served as counsel for Charles Taylor, who he has represented pro bono, and Saif al-Islam Gaddafi.