The investigations included victim hearings, archival research, as well as interviewing past and present government officials.[1] In its archival work, the IER worked with Moroccan civil society and human rights organizations in addition to victims and their families.[10] It is reported that 10,000 people were interviewed by the Investigations Committee and approximately 40,000 pieces of correspondence concerning the investigations were received.[10] The Commission held both public and private hearings.