Immigration is a topic that plays an important role in American society, it manages to capture both the general public as well as the political world. Especially in the United States of America, it is a very complex issue that affects a large number of sectors which is why a specific area has been selected for this thesis in order to narrow the researched field and provide detailed information. The thesis seeks to analyze the situation in immigration detention facilities throughout the U.S. with regard to basic human rights violations. For this reason, the thesis focuses on international humanitarian law and the Constitution of the United States, which should protect both legal and illegal immigrants, however, their non-compliance is one of the main points interconnecting all chapters of this paper. Due to the availability of resources and greater relevance this paper focuses on the situation of the last 15 years (namely from 2008 onwards) and attaches great importance to the final 3-4 years and the administration of Donald Trump. The thesis finds repeated and long-term violations of domestic and international law concerning human rights as well as the rights of asylum seekers and shows wrongful criminalization and dehumanization of immigrants (documented and undocumented). Furthermore, the thesis...