Across the state, CDCR officials work to prevent gang-related criminal activity in the state’s correctional institutions.
One such effort involved California State Prison, Los Angeles County (LAC). With investigations completed, details are being released regarding the 15-month-long efforts involving:
- LAC’s Institutional Gang Investigations unit (IGI)
- the Investigative Services Unit (ISU)
- CDCR’s Office of Correctional Safety’s (OCS) Criminal Intelligence Analysis Unit (CIAU).
Coordination and cooperation for investigators
Beginning in June 2018, the IGI was brought into an investigation initiated by the LAC ISU involving money transfers from multiple Mexican Mafia associates, also known as La Eme, and Sureño gang members housed at LAC to La Eme community facilitators. The transfers amounted to $71,000.

With help of CIAU special agents, officials were able to identify multiple La Eme associates housed at LAC. In all, it ended up as a conspiracy to introduce controlled substances for distribution with ties to La Eme. As a result, the LAC IGI filed a criminal case with the Los Angeles County District Attorney’s office.
As the investigation continued, the IGI corroborated intelligence regarding plans to distribute narcotics into LAC. Investigators found it was part of a larger Mexican Mafia scheme.
“This was gathered from multiple cellular telephone data extracts revealing multiple pay/owe sheets and kites (messages or notes passed between inmates) discovered during this investigation,” according to the IGI report. “Multiple Eme associates were identified on the discovered pay/owe sheets. Kites that further identified their participation in illicit activity, (showing) ongoing criminal activity at LAC. Subsequent to filing the case, arrest warrants were executed on the parties involved for conspiracy to introduce narcotics into a correctional institution with a gang nexus to the Mexican Mafia (EME) (Case No. MA076495). All inmates involved were re-housed in Administrative Segregation pending adjudication of their Rules Violation Reports (RVR), which were referred to the Los Angeles District Attorney’s Office.”
To gain more intelligence regarding the plans, investigators were given the green light from the LAC warden.
Massive search operations at LAC
Their orders were “to execute a mass search operation targeting specific Eme members and associates housed at LAC. This search operation commenced with the assistance of multiple IGI/ISUs from various institutions including California Institution for Men, California Rehabilitation Center, California Correctional Institution, California City Correctional Facility and southern region K-9 units. This operation was done in concert with the assistance of various OCS units including CIAU, Special Service Unit (SSU) Rancho Cucamonga field office and Gang Intelligence Operation (GIO) Fresno field office.”
In September 2019, LAC investigators assisted by CDCR investigative units and OCS Special Agents, gathered at the institution to conduct pre-dawn raids.
This search turned up narcotics, weapons, multiple pay/owe sheets, items indicating gang membership, cellular telephones, and financial information. The investigation resulted in the higher level-of-custody placement of five Eme associates and one Eme member.

By CSP-Los Angeles County staff
Learn more
- Meet OCS Special Agent Karen Mory.
- Learn more about OCS.
- Thwarting an escape plot was the goal of this 1891 San Quentin undercover operation.
- OCS Chief Derrick Marion graduates FBI Academy.
See more stories on joint operations.
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