This document examines the Italian system of criminalizing, detaining, and expelling irregular migrants. It finds that: 1) Only a small percentage (around 1.2%) of irregular migrants are detained each year, and even fewer (around 0.6%) are actually expelled. 2) The detention centers (CIEs) operate with a lack of transparency and their internal regulations and costs are kept secret. 3) The system violates both the Italian Constitution and EU law, by detaining migrants without proper legal justification and by using detention and expulsion as a first resort rather than a last option.