'Flores Settlement' and Alien Families Apprehended at the U.S. Border: Frequently Asked Questions [September 17, 2018] [open pdf - 1MB]
"The Immigration and Nationality Act (INA) authorizes--and in some case requires--DHS to detain aliens pending removal proceedings. However, neither the INA nor other federal laws specifically address when or whether alien family members must be detained together. DHS's options regarding the detention or release of alien families are significantly restricted by a binding settlement agreement from a case in the U.S. District Court for the Central District of California now called Flores v. Sessions. The 'Flores Settlement' establishes a policy favoring the release of alien minors, including accompanied alien minors, and requires that those alien minors who are not released from government custody be transferred within a brief period to non-secure, state-licensed facilities. DHS indicates that few such facilities exist that can house adults and children together. Accordingly, under the Flores Settlement and current circumstances, DHS asserts that it generally cannot detain alien children and their parents together for more than brief periods."
CRS Report for Congress, R45297
Congressional Research Service: https://crsreports.congress.gov/