One of the key features was masking the guards, and installing cell phone jammers. The hardcore criminals at CECOT have no communication to the outside world, not even through lawyers or family members.
Treatment of normal criminals in normal prisons is humane. But for the gangsters at CECOT it’s complete isolation forever. Or at least until Soros manages to overthrow Bukele.
Keep a very close eye on all of those lawyers.
They must be watched and wanded every single time they enter the facility, even if they only park in the lot, be darn sure they don’t “accidentally” leave a box of burner phones on the asphalt.