This chapter examines the design, implementation, and limitations of Early Intervention Systems (EISs) as proactive tools for managing police misconduct. EISs are structured frameworks intended to identify officers at heightened risk of problematic behaviour by monitoring indicators such as complaints, use-of-force incidents, and performance anomalies. The chapter traces the historical development of these systems, from early peer review programs and manual tracking to adoption under oversight, and international spread. Modern EISs aim to shift misconduct management from reactive discipline to preventative intervention, emphasising support, mentoring, and skill-building over punishment. Despite their promise, significant challenges remain. Many systems rely on inconsistent or incomplete data, arbitrary thresholds, and poorly structured interventions, reducing both predictive accuracy and officer trust. Cultural scepticism, resource constraints, and symbolic adoption further undermine legitimacy. Evidence suggests that a well-designed EIS can reduce complaints and adverse incidents, but outcomes are mixed, often shaped by the policing context and implementation quality. The chapter concludes that there is an emerging tendency to trust “plug and play” EIS solutions, but this approach features risk. EIS success appears to hinge on bespoke design or adaptation, continuous evaluation and refinement, and proactive attempts to integrate the approach into organisational culture.