Human rights groups warn that El Salvador's prisons are marked by overcrowding, lack of access to basic services and repeated rights violations — but that the situation is even worse for women, who are already vulnerable sector of the population.

The Trump administration admitted to deporting a migrant with no criminal history to El Salvador, but say they and the courts have no power to bring him back.

Two days later, he was on a plane heading to El Salvador's most notorious prison. The Trump administration deported Echavez and 237 countrymen labeled as Venezuelan gang members - with no chance to contest the allegations in court.