There are thousands of gangs in Texas, but only a dozen are considered such a threat to the state's prison system that all members, regardless of their crimes. are required to serve all their time isolated in one-man cells for 23 or more hours a day, reports the Houston Chronicle. Unlike other prisoners, they are not allowed to walk the yard or even have a prison job. They are locked down nearly around the clock, aside from when they are in some instances escorted alone to a larger cage for recreation or showering.
The state considers them too organized, too predatory and too dangerous to other inmates as well as prison staff to permit them among a prison's general population. The Texas Department of Criminal Justice calls them Security Threat Groups.