It was from your story above:
Whenever parents are charged with a federal misdemeanor (entry without inspection in this case), or awaiting trial, they are placed in the custody of the U.S. Marshals Service. Children cannot go to jail, so they are transferred to the custody of Health and Human Services’ Office of Refugee Resettlement. They are then placed with relatives, juvenile detention centers or foster care.
That’s a longstanding Homeland Security policy, DHS told us.
Did you not read the cut and paste job you posted?