Criminal history is a well-established predictor of future offending, yet recidivism risk declines with time. Research has struggled to reconcile this tension as criminal history is often treated as a static indicator of risk, while desistance is commonly inferred rather than directly modeled. Using a five-state population of criminal charges spanning forty years (N = 16,594,838; person-year observations = 746,396,524), we model recidivism prediction decay following a prior charge.