The Murder Detective, a BBC Studios documentary series about the police hunt for the killers of journalist Lyra McKee, used AI-generated faces and voices to disguise the officers who appear in it. The effects came from StudioNeural, Televisual reported on 2 September. McKee was shot while covering rioting in Derry in 2019, in a killing investigated as terrorism linked to the New IRA.
Director and producer James W. Newton spent seven years on the series, with the crew embedded in the PSNI's Serious Crime Branch and also given access to its intelligence unit and MI5. Because the investigators could face reprisals, more than 30 of them needed new identities on screen. Each one approved the face, hairstyle and voice designed for them before work started, and the pipeline ran under ISO 27001 security rules and a full AI audit.
The job came in late, during the offline edit, so nothing could be planned on set. StudioNeural had footage from many cameras and lenses, with focus pulls, blur, steep head angles and faces more than half hidden, by day and night. It rebuilt parts of its Neural Suite capture and performance-transfer tools, automated detection and masking in a ComfyUI workflow, and delivered over 60,000 frames. A new capture model was built to work regardless of lens or camera, to track faces more than half covered, and to handle 32-bit linear EXR images in ACES colour. Head of AI Rahul Raj says the detection, cropping and alignment steps had to be automated before any of the face work could run at that scale. Voice models tuned to the local accent masked how the officers sounded, and hair and other details were changed in Nuke, Blender and Mocha.
Founder Barnaby Francis presents the work as borrowing the mask of a group that hides its own members, this time to protect the people pursuing it, and says the goal was to keep each investigator's real expressions rather than replace them. He singles out a group scene of the lead officers briefing their teams, full of close-ups, focus pulls and people crossing the frame, as the one that had to let viewers connect with the officers on screen. The series began on Channel 4 on 26 August; no images of the treated footage were released, for security reasons.
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