The development of a trauma-informed Scotland is an ambitious and important agenda, but not without its challenges and limitations. In restrictive settings that rely on the application of power and control as part of their modus operandi, genuinely trauma-informed practice may be difficult to achieve. Drawing on interviews with 11 children, this article maps their experiences of police custody to trauma-informed practice principles. The gap between the espoused policies and the realities of custom and practice outlines the boundaries of trauma-informed practice in justice settings. The article concludes that police custody is antithetical to the concept of trauma-informed practice.