In this supplementary report, the data obtained through monitoring, advocacy, and reporting activities of the CISST Child in Prison thematic area, the thematic report titled Being a Child Prisoner in Turkey on the 30th Anniversary of the United Nations Convention on the Rights of the Child, the United Nations Convention on the Rights of the Child (UNCRC), the United Nations Rules for the Protection of Juveniles Deprived of their Liberty (the Havana Rules), combined fourth and fifth periodic reports submitted by Turkey under article 44 of the Convention (Periodic Report), and current practices were evaluated. Since the report is prepared specifically for a thematic area, only the part of the Periodic Report dealing with children in prison was analyzed. In this document, which covers planning for the years 2013-2017, it is emphasized that the juvenile justice system does not have sanctions specific to children, the general practices regarding imprisonment are also binding for children, the regulations stipulated in the Juvenile Protection Law are not implemented, and imprisonment is not seen as a last resort. In the Periodic Report, juvenile prisoners were examined under the heading of “Children in conflict with the law, child victims and child witnesses”.