The Syndicato Nuevo Mexico is a brutal gang that rules the prisons of New Mexico. Also known as the āS,ā they boast a rap sheet that includes drug sales, vicious beatings, and cold-blooded murder. Formed in the 1980s after one of the deadliest prison riots in US history, the āSā has become one of the most feared prison gangs in the country. If prison is hell, than SNM is the devil.