This booklet provides an overview of the scope of killing of children, adolescents1 and young adults. The analysis starts at the global level and then considers the main world regions where data are available. Subsequently, it covers various types of child killing within and outside the family, the latter category including the killing of children in the context of organized crime, particularly as a consequence of drug trafficking, community violence, gang-related violence and violent extremism. The focus then shifts to the link between lethal and non-lethal violence against children. Lastly, the criminal justice and policy responses used to combat various forms of serious violence against children are examined.