From the very beginning, Chicago P.D. established that no one in the Intelligence Unit was ever truly safe. One of the earliest and most memorable losses came in Season 1 with the death of Sheldon Jin, portrayed by Archie Kao—a shocking moment that set the tone for the high stakes that would define the series.
Who Was Sheldon Jin?
Introduced in the pilot, Sheldon Jin was the Intelligence Unit’s tech expert and computer sleuth. While he didn’t work in the field, Jin was crucial behind the scenes, tracking surveillance, coordinating data, and giving the team the edge they needed in high-pressure investigations.
Despite his calm exterior, Jin found himself increasingly trapped in a tense, dangerous situation as Season 1 progressed.
The Events Leading to His Death
Jin was coerced into reporting to Internal Affairs as a mole when Sergeant Edwin Stillwell (Ian Bohen) leveraged his sick father’s gambling addiction to force compliance. Though he cared deeply for his colleagues, Jin’s reluctant betrayal put him in an impossible position.
His guilt and fear of consequences made him a nervous wreck, and despite trying to comply, his actions failed to satisfy Stillwell.

The Tragic Death of Sheldon Jin
In the Season 1 finale (“A Beautiful Friendship”), Jin’s story reached a devastating climax. Hours before his death, he packed his bags, hinting he feared the worst. Later, Hank Voight (Jason Beghe) discovered Jin had been murdered with his throat slashed, a shocking scene that left fans stunned.
Voight quickly suspected Stillwell’s involvement. After gathering evidence, he confronted the Internal Affairs Sergeant and helped Jin’s family with financial support, ensuring that justice was served.
Why This Death Mattered
Sheldon Jin’s death wasn’t just a shocking plot twist—it became a cautionary tale for the Intelligence Unit and a defining moment for Voight. It demonstrated the dangers of secrecy, betrayal, and corruption, while also proving that the stakes in Chicago P.D. could hit just as hard behind the desk as on the streets.
Watch Chicago P.D. on Wednesdays at 10/9c on NBC, with new episodes available the next day on Peacock.