"The children were separated between July 1, 2017, and June 26, 2018, when a federal judge in San Diego ordered that children in government custody be reunited with their parents." 545 children's parents can't be located. https://www.snopes.com/ap/2020/10/21/parents-of-545-children-separated-at-border-cant-be-found/
Department of Homeland Security Office of the Inspector General Report – Findings indicate law enforcement and administrative officials deceived the OIG in their statements to investigators. However, there was no corrective actions taken in any of the deficiencies or misconduct identified.
“On June 23, 2018, DHS announced that DHS and HHS had “a central database” containing location information for separated parents and minors that both departments could access and update. However, OIG found no evidence that such a database exists. The OIG team asked several ICE employees, including those involved with DHS’ reunification efforts at ICE Headquarters, if they knew of such a database, and they did not.” Page 10 OIG Report 18-84
DEPRIVATION OF RIGHTS UNDER THE COLOR OF LAW - 18 U.S. Code § 242 - Deprivation of rights under color of law | U.S. Code | US Law | LII / Legal Information Institute (cornell.edu)