Most likely you’ve never heard of Jakiw Palij and there’s no reason you should have. Palij has lived in America since 1949 and today is the last known Nazi war criminal living in this country. He was once granted US citizenship but in 2004 a federal judge stripped him of that and ordered he be deported. He is still here and ICE (Immigration and Customs Enforcement) has no plans to boot him out because no nation wants him.
Another name you’ve probably not heard is Miguel Perez Jr. , Perez was in America on a permanent green card, joined the US Army and did two tours in Afghanistan. When he returned he was diagnosed with PTSD and possible brain damage. He was charged with cocaine possession, had his green card stripped, and sentenced to fifteen years in prison. After serving half his sentence he was turned over to ICE and has since been deported to Mexico leaving behind his parents and children who are all US citizens.