DHS Implementation of Executive Order #13769 'Protecting the Nation from Foreign Terrorist Entry into the United States' (January 27, 2017) [open pdf - 24MB]
"Following news reports that U.S. Customs and Border Protection (CBP) personnel implementing Executive Order #13769 (EO) 'Protecting the Nation from Foreign Terrorist Entry into the United States' '(January 27, 2017)' potentially violated the civil rights of individual travelers, we received a congressional request to investigate DHS's implementation of the EO [Executive Order]. In response, we investigated how DHS and CBP, the DHS entity primarily responsible for implementation of the EO, responded to challenges presented by the EO, including the consequence of court orders and CBP's compliance with them. [...] This report contains no recommendations."
Department of Homeland Security, Office of Inspector General, Report No. OIG-18-37
U.S. Department of Homeland Security Office of Inspector General: https://www.oig.dhs.gov/