Shannon Duncan, a retired correctional captain from Kern Valley State Prison, passed away March 25, 2024.
He started his career with the Department in November 1994 as a cadet. After graduating the Basic Correctional Officer Academy, he reported to Pleasant Valley State Prison in December.
Duncan transferred to Wasco State Prison in October 1999. In March 2006, he then transferred to Kern Valley State Prison where he rose through the ranks to Captain. He remained at Kern Valley until retiring in June 2020.
Memorial services are not finalized at this time.
Read more tributes to staff and retirees who have passed away.
Follow CDCR on YouTube, Facebook, X (formerly Twitter). Listen to the CDCR Unlocked podcast.
Recent obituaries
Ismael Martinez, retired correctional lieutenant
Ismael Martinez, a retired correctional lieutenant from Central California Women’s Facility in Chowchilla, passed away July 14, 2026. He worked…
CMF mourns loss of Melissa Boos, management services tech
Melissa Boos, a management service technician at California Medical Facility (CMF) in Vacaville, passed away July 21, 2026. She worked…
CSP‑Solano mourns loss of Kevin Thomas, health records tech
Kevin Thomas, a health records technician at California State Prison-Solano, passed away June 22, 2026. Thomas began his career as…
San Quentin mourns passing of Jonathan Castillo, office tech
Jonathan Castillo, an office technician at San Quentin Rehabilitation Center, passed away Feb. 1, 2026. Castillo began his career at…
CSP‑Sacramento mourns passing of Altug Misirli, lieutenant
Altug Misirli, a correctional lieutenant at California State Prison-Sacramento, passed away July 14, 2026. Misirli began his career with the…
Vicky Herrera, retired case records technician
Vicky Herrera, a retired case records technician from North Kern State Prison in Delano, passed away June 28, 2026. Services…