With the development of social networks and communication techniques, the whole world is discovering with astonishment the extent of the damage caused by ritual crimes, the victims of which are often children, women, albinos and people whose vulnerability gives free rein to the evil, sadistic imagination. Rituals linked to magic and witchcraft, acts of cannibalism, organ harvesting and trafficking in human blood and organs, punctuate the daily life of some countries in the world, particularly in Africa. Social deprivation, the voracious pursuit of fame and power, and the frantic race for wealth mean that the continent's populations indulge in macabre practices. Criminal research into ritual crimes cannot thrive unless the players involved are grounded in ethnology or knowledge of the 'ethnic' behaviour of criminals. Ethno-criminology is the ideal tool for this purpose, and by examining the criminal habits of different countries around the world, we can draw up a catalogue of methods that will enable us to gain a better understanding of these crimes, which combine magical and witchcraft practices...