The United Nations Office for Drugs and Crime outlines a comprehensive list of human trafficking indicators. Naturally, due to the constantly evolving nature of the crime, it’s form and methods change and new indicators must be recognised on an ongoing basis. The typologies in this list cover General Indicators, Children, Domestic Servitude, Sexual Exploitation, Labour Exploitation and Begging and Petty Crime.
For the full UNODC document on Human Trafficking Indicators, read here.