Text in English / This research attempts to analyse the modus operandi (MO) of perpetrators used in cases of trafficking in persons for sexual purposes, and trafficking in children. The Trafficking in Persons Bill was passed in South Africa, but not gazetted; therefore, alternate charges are used to prosecute perpetrators. The purpose, value and elements of MO allow an investigator to link a perpetrator to a specific crime scene. The research provides an examination of case dockets and the MO of perpetrators in human trafficking – inter alia, looking at such issues as time, location, transport routes used, criminal motive, recruitment styles, and the number of offenders. The MO of perpetrators identified during docket analysis indicates many similarities, when compared to the international MO of traffickers. The gathering of MO information forms a critical part of any investigation to link a perpetrator to a crime. This research therefore presents a comprehensive examination of the MO of perpetrators, and delivers practical recommendations to monitor and combat trafficking. / Police Practice / M. Tech. (Forensic Investigation)