The United States government holds tens of thousands of immigrants in detention under the control of Customs and Border Protection (CBP; principally the Border Patrol) and the Immigration and Customs Enforcement (ICE). Immigrants are detained for unlawful entry to the United States, when their claims for asylum are received (and prior to release into the United States by parole), and in the process of deportation and removal from the country. During Fiscal Year 2018, 396,448 people were booked into ICE custody: 242,778 of whom were detained by CBP and 153,670 by ICE's own enforcement operations. A daily average of 42,188 immigrants (40,075 adult and 2,113 in families) were held by ICE in that year. In addition, over twelve thousand immigrant children are housed by facilities under the supe