A gang member was caught smuggling drugs into Los Angeles County's main jail. He was, authorities say, just one cog in the Mexican Mafia's lucrative operation in the county jails.

The clica system ended in 2015 when Mexican Mafia members who had been held for years in isolation in Pelican Bay’s Security Housing Unit were reassigned to other prisons around the state.

A low-level Mafia member admitted yesterday that he shot and killed Springfield’s regional mob boss in 2003 in exchange for $10,000 from rivals who wanted to usurp his power. Frankie Roche, 35 ...