The UN’s special rapporteur on the human rights of migrants has submitted a formal request for an investigation into the death of Jakelin Caal Maquin, a seven-year-old Guatemalan migrant who died of dehydration and shock while in the custody of U.S. Customs and Border Protection earlier this month, The Guardian reports.

The big picture: The UN watchdog, Felipe González Morales, told The Guardian that the Trump administration must abide by international obligations to protect the rights of migrants who arrive at the border, especially children. Part of what led Morales to call for an independent, "in-depth" inquiry is that key facts of the case — including the state of Maquin's health when she was taken into custody and whether she and her father were offered water — have been disputed by CBP.