{
  "id": "AIBD-0132",
  "title": "Met Police live facial recognition flags David Cheneler, a sex offender breaching his order, alone with a six-year-old girl and a lock knife at Denmark Hill",
  "summary": "Met LFR flagged David Cheneler, 73, with a six-year-old and a lock knife at Denmark Hill, Jan 2025, breaching his SOPO; jailed 20 May 2025.",
  "date_observed": "2025-05-20",
  "date_basis": "unassessed",
  "date_precision": "unassessed",
  "benefit_status": null,
  "source_collection": null,
  "source_entry": null,
  "account": "In January 2025 Metropolitan Police Live Facial Recognition (LFR) cameras on a van at Denmark Hill identified David Cheneler, 73. He was under a 2019 Sexual Offences Prevention Order barring him from being alone with children under 14. The order followed a 2010 conviction for 15 counts of indecent assault on a female under 16 and five of gross indecency with a child. Officers found him with a six-year-old girl he had collected from school for her mother. The mother did not know his history. A lock knife was hidden in his belt buckle. He pleaded guilty at Wimbledon Magistrates' Court on 13 January 2025 to breaching the order and possessing an offensive weapon. On 20 May 2025 Kingston Crown Court jailed him for two years.",
  "category": "protective response",
  "unexpected": false,
  "purpose": "The Met deploys Live Facial Recognition cameras on police vans to identify people of interest and alert officers. Its LFR lead, Lindsey Chiswick, describes the aim as using data and technology to identify offenders that pose a risk to our communities. Identifying a sex offender in breach of his order was that purpose.",
  "system": "Live Facial Recognition (LFR) cameras mounted on a Metropolitan Police van",
  "model_version": null,
  "developer": null,
  "deployer": "Metropolitan Police Service",
  "location": "London, United Kingdom",
  "domain": "Policing / public protection",
  "segment": "Law enforcement use of live facial recognition in public places",
  "benefit_type": "Reduced Violence",
  "taxonomy_note": null,
  "registry_ids": {
    "oecd_aim": "2025-05-20-368b"
  },
  "ratings": [
    {
      "group": "personal",
      "depth": 2,
      "reason": "A six-year-old girl was taken out of unsupervised contact with a man convicted of 15 counts of indecent assault on a female under 16. He had collected her from school twice before and was carrying a lock knife. Material for one child, though the Met itself puts the averted abuse as possible rather than established."
    },
    {
      "group": "societal",
      "depth": 1,
      "reason": "The public: a registered sex offender in breach of his order was jailed for two years. The Met presents this as removing a dangerous offender from the streets. The OECD Monitor tags the same event with human-rights, psychological, reputational and public-interest harm types. The wider benefit is therefore contested."
    }
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  "ai_role": {
    "status": "assessed",
    "statement": "The LFR system did the identification. Cameras on the back of a van at Denmark Hill matched Cheneler's face and alerted officers, Southwark News reports. Finding the child and the knife, the arrest, the charges and the sentence were human and judicial acts. The offense itself existed only because of his 2019 order. The counterfactual is the Met's own hedge. DC Adam Pearce said it is possible that, had he not been identified, Cheneler could have gone on to abuse the child. No allegation about this occasion is reported. The readable source does not name the vendor or algorithm. The Met's press release is not among the sources."
  },
  "evidence": [
    {
      "kind": "news report",
      "citation": "Clarke I (2025). Sex offender caught in Denmark Hill thanks to facial recognition cameras. Southwark News, 21 May 2025.",
      "title": "Sex offender caught in Denmark Hill thanks to facial recognition cameras",
      "url": "https://southwarknews.co.uk/area/camberwell/sex-offender-caught-in-denmark-hill-thanks-to-facial-recognition-cameras/",
      "date": "2025-05-21",
      "written_by": "independent",
      "quote": "was caught in January in Denmark Hill after his face was identified by Live Facial Recognition cameras attached to the back of a van"
    },
    {
      "kind": "other",
      "citation": "OECD.AI (2025). Live Facial Recognition Apprehends Sex Offender in Breach. OECD AI Incidents and Hazards Monitor, incident 2025-05-20-368b.",
      "title": "Live Facial Recognition Apprehends Sex Offender in Breach",
      "url": "https://oecd.ai/en/incidents/2025-05-20-368b",
      "date": null,
      "written_by": "independent",
      "quote": "prevented possible harm to the child and others"
    },
    {
      "kind": "news report",
      "citation": "Biometric Update (2025). London police mark 1K arrests through live facial recognition. Biometric Update, 4 July 2025.",
      "title": "London police mark 1K arrests through live facial recognition",
      "url": "https://www.biometricupdate.com/202507/london-police-mark-1000-arrests-through-live-facial-recognition",
      "date": "2025-07-04",
      "written_by": "independent",
      "quote": null
    }
  ],
  "replication": {
    "produced_by": [
      "A van-mounted LFR deployment at Denmark Hill in January 2025 and a face the system was able to identify. The match alerted officers on the spot.",
      "Officers who stopped him at once and found the child and the lock knife hidden in his belt buckle. They knew the terms of his 2019 Sexual Offences Prevention Order.",
      "A court record of the order and his 2010 convictions. This turned the stop into a guilty plea for breaching the order and possessing an offensive weapon."
    ],
    "must_hold": [
      "The person must be known to the system and subject to conditions that make his presence with a child an offense. The benefit depends on the prior order, not on the camera alone.",
      "Officers must verify the match and intervene immediately. The child was found only because he was stopped on the spot.",
      "The deployment must be lawful and proportionate. The OECD Monitor files this same event under human-rights, psychological, reputational and public-interest harm types. The protective benefit therefore sits beside a contested surveillance practice."
    ],
    "echoes": []
  },
  "paired_incident": null,
  "headline": "Met LFR flags David Cheneler, a sex offender, alone with a child",
  "metric": "Kingston Crown Court jailed him for two years",
  "comparator": {
    "against": "not being identified (no live facial recognition check)",
    "before": "it’s possible if he hadn’t been identified using this technology, he could have gone on to abuse this child",
    "after": "his face was identified by Live Facial Recognition cameras attached to the back of a van, alerting officers to his presence",
    "basis": "assumed",
    "quote": "Although there were no allegations made towards David Cheneler on this occasion, it’s possible if he hadn’t been identified using this technology, he could have gone on to abuse this child.",
    "url": "https://southwarknews.co.uk/area/camberwell/sex-offender-caught-in-denmark-hill-thanks-to-facial-recognition-cameras/"
  },
  "later": {
    "status": "scaled",
    "date": "2025-07-04",
    "note": "Six weeks after the sentencing the Met announced more than 1,000 LFR arrests since the start of 2024, with 773 people charged or cautioned and 93 registered sex offenders identified, and published Cheneler's case as one of its case studies.",
    "quote": "The police service published several case studies, including 73-year-old David Cheneler, a registered sex offender who was found to be with a six-year-old girl in breach of a court order.",
    "url": "https://www.biometricupdate.com/202507/london-police-mark-1000-arrests-through-live-facial-recognition"
  },
  "value": null,
  "developer_country": null,
  "deployer_country": "United Kingdom",
  "unrated_because": null,
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      "date": "2026-10-20",
      "change": "Record drafted from the OECD Monitor entry and the cited sources. Dated 20 May 2025, the sentencing at Kingston Crown Court and the Monitor's own date; the LFR identification happened in January 2025 (Southwark News), before his guilty plea at Wimbledon Magistrates' Court on Monday 13 January 2025, and no readable source gives the day. Of the Monitor's eleven sources only Southwark News could be read: BBC, Sky News, The Times, Daily Mail, Mirror, The Irish Sun, Daily Star and News Shopper are not fetchable by this tool, the London News Online and Parikiaki pages are gone, and the Met newsroom search did not render, so the Met's press release was not read and the vendor and algorithm are not named. Filed as protective response with prevention unproven rather than the classifier's specific harm prevented because the Met's own officer put the averted abuse as possible and no allegation about this occasion is reported.",
      "source": "https://oecd.ai/en/incidents/2025-05-20-368b",
      "editor": "AIBD"
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    {
      "date": "2026-10-21",
      "change": "Benefit type set to Reduced Violence under Trustible's full taxonomy of 23 types; it was Improved Organizational Efficiency among the six first used.",
      "source": "https://trustible.ai/post/a-framework-for-measuring-the-benefits-of-ai/",
      "editor": "AIBD"
    },
    {
      "date": "2026-10-21",
      "change": "Added what the benefit is measured against, what happened since from the cited sources.",
      "source": "https://southwarknews.co.uk/area/camberwell/sex-offender-caught-in-denmark-hill-thanks-to-facial-recognition-cameras/; https://www.biometricupdate.com/202507/london-police-mark-1000-arrests-through-live-facial-recognition",
      "editor": "AIBD"
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    {
      "date": "2026-10-21",
      "change": "Country of the deployer added from the organization's own site or a registry.",
      "source": "https://en.wikipedia.org/wiki/Metropolitan_Police",
      "editor": "AIBD"
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      "date": "2026-10-21",
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  "confidence": "reported",
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  "claim_status": "Independently reported",
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              "note": "Six weeks after the sentencing the Met announced more than 1,000 LFR arrests since the start of 2024, with 773 people charged or cautioned and 93 registered sex offenders identified, and published Cheneler's case as one of its case studies.",
              "quote": "The police service published several case studies, including 73-year-old David Cheneler, a registered sex offender who was found to be with a six-year-old girl in breach of a court order.",
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            "account": "In January 2025 Metropolitan Police Live Facial Recognition (LFR) cameras on a van at Denmark Hill identified David Cheneler, 73. He was under a 2019 Sexual Offences Prevention Order barring him from being alone with children under 14. The order followed a 2010 conviction for 15 counts of indecent assault on a female under 16 and five of gross indecency with a child. Officers found him with a six-year-old girl he had collected from school for her mother. The mother did not know his history. A lock knife was hidden in his belt buckle. He pleaded guilty at Wimbledon Magistrates' Court on 13 January 2025 to breaching the order and possessing an offensive weapon. On 20 May 2025 Kingston Crown Court jailed him for two years.",
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          }
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            "location": "London, United Kingdom",
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            "purpose": "The Met deploys Live Facial Recognition cameras on police vans to identify people of interest and alert officers. Its LFR lead, Lindsey Chiswick, describes the aim as using data and technology to identify offenders that pose a risk to our communities. Identifying a sex offender in breach of his order was that purpose."
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                "date": "2026-10-20",
                "change": "Record drafted from the OECD Monitor entry and the cited sources. Dated 20 May 2025, the sentencing at Kingston Crown Court and the Monitor's own date; the LFR identification happened in January 2025 (Southwark News), before his guilty plea at Wimbledon Magistrates' Court on Monday 13 January 2025, and no readable source gives the day. Of the Monitor's eleven sources only Southwark News could be read: BBC, Sky News, The Times, Daily Mail, Mirror, The Irish Sun, Daily Star and News Shopper are not fetchable by this tool, the London News Online and Parikiaki pages are gone, and the Met newsroom search did not render, so the Met's press release was not read and the vendor and algorithm are not named. Filed as protective response with prevention unproven rather than the classifier's specific harm prevented because the Met's own officer put the averted abuse as possible and no allegation about this occasion is reported.",
                "source": "https://oecd.ai/en/incidents/2025-05-20-368b",
                "editor": "AIBD"
              },
              {
                "date": "2026-10-21",
                "change": "Benefit type set to Reduced Violence under Trustible's full taxonomy of 23 types; it was Improved Organizational Efficiency among the six first used.",
                "source": "https://trustible.ai/post/a-framework-for-measuring-the-benefits-of-ai/",
                "editor": "AIBD"
              },
              {
                "date": "2026-10-21",
                "change": "Added what the benefit is measured against, what happened since from the cited sources.",
                "source": "https://southwarknews.co.uk/area/camberwell/sex-offender-caught-in-denmark-hill-thanks-to-facial-recognition-cameras/; https://www.biometricupdate.com/202507/london-police-mark-1000-arrests-through-live-facial-recognition",
                "editor": "AIBD"
              },
              {
                "date": "2026-10-21",
                "change": "Country of the deployer added from the organization's own site or a registry.",
                "source": "https://en.wikipedia.org/wiki/Metropolitan_Police",
                "editor": "AIBD"
              },
              {
                "date": "2026-10-21",
                "change": "Prose pass: a rating reason, account, purpose, the replication conditions, the system's part rewritten in shorter sentences with abbreviations expanded; facts, figures and quotations unchanged.",
                "editor": "AIBD"
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                "date": "2026-10-21",
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                "A van-mounted LFR deployment at Denmark Hill in January 2025 and a face the system was able to identify. The match alerted officers on the spot.",
                "Officers who stopped him at once and found the child and the lock knife hidden in his belt buckle. They knew the terms of his 2019 Sexual Offences Prevention Order.",
                "A court record of the order and his 2010 convictions. This turned the stop into a guilty plea for breaching the order and possessing an offensive weapon."
              ],
              "must_hold": [
                "The person must be known to the system and subject to conditions that make his presence with a child an offense. The benefit depends on the prior order, not on the camera alone.",
                "Officers must verify the match and intervene immediately. The child was found only because he was stopped on the spot.",
                "The deployment must be lawful and proportionate. The OECD Monitor files this same event under human-rights, psychological, reputational and public-interest harm types. The protective benefit therefore sits beside a contested surveillance practice."
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                "change": "Record drafted from the OECD Monitor entry and the cited sources. Dated 20 May 2025, the sentencing at Kingston Crown Court and the Monitor's own date; the LFR identification happened in January 2025 (Southwark News), before his guilty plea at Wimbledon Magistrates' Court on Monday 13 January 2025, and no readable source gives the day. Of the Monitor's eleven sources only Southwark News could be read: BBC, Sky News, The Times, Daily Mail, Mirror, The Irish Sun, Daily Star and News Shopper are not fetchable by this tool, the London News Online and Parikiaki pages are gone, and the Met newsroom search did not render, so the Met's press release was not read and the vendor and algorithm are not named. Filed as protective response with prevention unproven rather than the classifier's specific harm prevented because the Met's own officer put the averted abuse as possible and no allegation about this occasion is reported.",
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                "date": "2026-10-21",
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                "source": "https://southwarknews.co.uk/area/camberwell/sex-offender-caught-in-denmark-hill-thanks-to-facial-recognition-cameras/; https://www.biometricupdate.com/202507/london-police-mark-1000-arrests-through-live-facial-recognition",
                "editor": "AIBD"
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              {
                "date": "2026-10-21",
                "change": "Country of the deployer added from the organization's own site or a registry.",
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                "date": "2026-10-21",
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      "systems[].model_name": {
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          "kind": "record_fields",
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        "state": "not_assessed",
        "review_state": "not_assessed",
        "coverage": "partial"
      },
      "title": {
        "state": "value_present",
        "value": {
          "kind": "record_fields",
          "fields": {
            "title": "Met Police live facial recognition flags David Cheneler, a sex offender breaching his order, alone with a six-year-old girl and a lock knife at Denmark Hill",
            "headline": "Met LFR flags David Cheneler, a sex offender, alone with a child"
          }
        },
        "provenance": {
          "kind": "legacy_record",
          "basis": "Preserved from the existing AIBD record; external sources were not rechecked.",
          "record_fields": [
            "title",
            "headline"
          ],
          "source_refs": []
        },
        "review_state": "record_mapped",
        "coverage": "partial"
      },
      "version": {
        "state": "value_present",
        "value": {
          "kind": "identifiers",
          "identifiers": [
            "7223682fc26832f65d4c5cca613d50d644e7ee22c73c627e7e0719274193e544"
          ],
          "role": "SHA-256 of normalized original case data"
        },
        "provenance": {
          "kind": "curatorial",
          "basis": "Deterministic content version assigned by the local migration.",
          "record_fields": [],
          "source_refs": []
        },
        "review_state": "record_mapped",
        "coverage": "complete"
      },
      "workflow": {
        "state": "value_present",
        "value": {
          "kind": "record_fields",
          "fields": {
            "account": "In January 2025 Metropolitan Police Live Facial Recognition (LFR) cameras on a van at Denmark Hill identified David Cheneler, 73. He was under a 2019 Sexual Offences Prevention Order barring him from being alone with children under 14. The order followed a 2010 conviction for 15 counts of indecent assault on a female under 16 and five of gross indecency with a child. Officers found him with a six-year-old girl he had collected from school for her mother. The mother did not know his history. A lock knife was hidden in his belt buckle. He pleaded guilty at Wimbledon Magistrates' Court on 13 January 2025 to breaching the order and possessing an offensive weapon. On 20 May 2025 Kingston Crown Court jailed him for two years.",
            "replication": {
              "produced_by": [
                "A van-mounted LFR deployment at Denmark Hill in January 2025 and a face the system was able to identify. The match alerted officers on the spot.",
                "Officers who stopped him at once and found the child and the lock knife hidden in his belt buckle. They knew the terms of his 2019 Sexual Offences Prevention Order.",
                "A court record of the order and his 2010 convictions. This turned the stop into a guilty plea for breaching the order and possessing an offensive weapon."
              ],
              "must_hold": [
                "The person must be known to the system and subject to conditions that make his presence with a child an offense. The benefit depends on the prior order, not on the camera alone.",
                "Officers must verify the match and intervene immediately. The child was found only because he was stopped on the spot.",
                "The deployment must be lawful and proportionate. The OECD Monitor files this same event under human-rights, psychological, reputational and public-interest harm types. The protective benefit therefore sits beside a contested surveillance practice."
              ],
              "echoes": []
            }
          }
        },
        "provenance": {
          "kind": "legacy_record",
          "basis": "Preserved from the existing AIBD record; external sources were not rechecked.",
          "record_fields": [
            "account",
            "replication"
          ],
          "source_refs": []
        },
        "review_state": "record_mapped",
        "coverage": "partial"
      }
    },
    "summary": {
      "total": 91,
      "addressed": 91,
      "known": 28,
      "reviewed": 0,
      "record_mapped": 28,
      "not_assessed": 63,
      "complete": false,
      "by_state": {
        "value_present": 28,
        "not_reported": 0,
        "unresolved": 0,
        "not_assessed": 63,
        "not_applicable": 0,
        "withheld": 0,
        "source_unavailable": 0
      }
    }
  }
}