This article discusses how administrative practices shape immigration detention policies, addressing both administrative discretion in detention orders and their judicial supervision. Due to vaguely formulated legal criteria and ineffective ex-post judicial supervision, the authorities have considerable discretionary powers in ordering detentions for noncompliant and criminalized noncitizens. Instead of being a measure of last resort, immigration detention is used in a routine manner, with little individual assessment, for the enforcement of removals and the prevention of irregular migration, as well as extensively for crime prevention. The findings demonstrate the role of the police as the main actor in the detention system in Finland, with significant implications for the formation of detention policies.

中文翻译：

---

作为常规警察措施的移民拘留：芬兰非公民优先拘留中的自由裁量权

本文讨论了行政实践如何塑造移民拘留政策，涉及拘留令中的行政自由裁量权及其司法监督。由于法律标准模糊，事后司法监督不力，当局在下令拘留不合规和被定罪的非公民方面拥有相当大的自由裁量权。移民拘留不是万不得已的措施，而是以常规方式使用，几乎没有个人评估，用于强制遣返和防止非正常移民，以及广泛用于预防犯罪。调查结果表明警察在芬兰拘留系统中的主要角色，对拘留政策的形成具有重要意义。