["\n\nPurpose\nWe question the commonly assumed view of a fixed causal ordering between self‐control, delinquency, and sanctions and test the hypothesis that experiencing sanctions may reduce levels of self‐control, thereby increasing the risk of future delinquent behaviour. As a subsidiary goal, we argue for a parsimonious view of self‐control that is limited to its key components, risk‐taking, and impulsivity.\n\n\nMethods\nWe use three waves of data from the Zurich Project on the Social Development from Childhood into Adulthood (z‐proso), an ongoing prospective longitudinal study of Swiss urban youth (N = 1,197), and include police contacts and school sanctions as predictors of delinquency. We test our hypothesis using path analysis and control for a series of potential confounders, including prior levels of self‐control and earlier delinquency.\n\n\nResults\nIn line with our hypothesis, the results indicate that sanctioning reduces levels of self‐control, net of prior levels of self‐control, and earlier delinquency and that self‐control mediates the relation between sanctioning and subsequent delinquency.\n\n\nConclusions\nWe conclude that the relation between self‐control and crime may be bi‐ rather than unidirectional with sanctions reducing levels of self‐control, which in turn contributes to criminal behaviour. Implications for theory are discussed.\n\n", "Legal and Criminological Psychology, Volume 25, Issue 2, Page 199-218, September 2020. "]