The Trump Administration is deporting illegal immigrants who have committed crime in this country to their home country. Some countries refused to accept their own citizens. They are in prison now in USA.
The El Salvador Government has offered to house in their own prisons dangerous and violent US criminals and deportees of any nationality for a fee. The Trump Administration has not decided whether to take up on their offer. There may be legal battles in courts if the US Government decides to deport their own citizens who are hardened criminals to the El Salvador prisons. Cost wise it is cheaper for US Government to put the criminals in El Salvador prisons than in US prisons.
The prisons in El Salvador are notorious. Those prisons are inhumane. After President Nayib Bukele was elected in El Salvador he declared a State of Emergency to quell gang violence, sent the military into the streets, and arrested thousands of gang members and criminals. With his notorious prison system, gangs and criminals are no longer a threat in El Salvador.
Here is a YouTube video documentary of El Salvador prison.
Here is a tongue-in-cheek remark.
To the outside world, India is considered rape and sexual assault capital. I wish the Indian Government negotiate with El Salvadoran government to take these guys and incarcerate in their prison. Or, at least show the El Salvador prison video widely and threaten every would-be rapist that they will be sent there. And, actually send a few rapists there and publicize that. I think this will put a stop to rape and sexual assault in India.
Please remember this is a tongue-in-cheek remark.