Inmate predators force weaker inmates to hide drugs in their cells and take the rap if they're caught. But one inmate risks his life to become an informant, helping special agents eliminate the inmates' outside drug source.
Two inmates suffer life-threatening stab wounds during a melee on the exercise yard that involved one shank, one pool stick, and two rival gangs. Squad members must determine what motivated the fight and who is responsible, before the prison explodes.
An inmate collapses and dies from multiple stab wounds. Police collect forensic evidence, parse surveillance video, and explore a possible connection to the deadly El Salvadoran gang MS-13.
The Squad investigates a major drug smuggling operation potentially connected to the Crips, abetted by a source outside the prison. A case involving morphine, cocaine & a bizarre love triangle leads the Squad to the community for a dramatic street bust.
An anonymous letter from an inmate threatens to raise a small army and attack correctional officers. Sgt. orders a raid on the cell block, breaks up a secret meeting of the Vice Lordz, and explores a possible Aryan connection to the threats.
The Squad fears that prison gang members are running an extortion game when an inmate's family starts receiving violent threats from a mysterious caller with ties to the Crips.
An inmate with a shank sticking out of his stomach is rushed to the infirmary. No witnesses. No security video. Just before losing consciousness, the victim gives Special Agent Joe England a big lead on the case.
Tired of finding cell phones, drugs, & illegal substances inside the prison, investigators attack the source: smugglers on the outside; a surprise search of hundreds of prison visitors uncovers an illegal drug operation and deadly packages for smuggling.
With such rampant inmate drug use, the Squad searches for the source of drugs coming into the prison. John Fisher goes undercover to monitor prisoners' visitors, search an entire cellblock for evidence, and work with an inmate informant to set up a sting.