Utah Department of Corrections

Five years ago, the Department of Corrections (Department) experienced an increase in
gang violence between two specific gangs within the prison system. As with all significant safety
and security related matters, the prisons were locked down, investigations were conducted, steps
were taken to mitigate risk, and the prisons were supposed to return to normal operations.

Read more here: https://corrections.utah.gov/STG_Schedule_Changes.pdf