{"id":"AIBD-1143","title":"Lower Saxony's State Audit Office reports that Kipo Analyzer and Tracebook Kipo considerably eased police review of child abuse images","summary":"Lower Saxony's State Audit Office reports that AI tools that pre-sort seized abuse images, used by the state police since 2020, considerably reduced investigators' workload.","date_observed":"2026-06-10","date_basis":"source publication","date_precision":"day","benefit_status":"reported","source_collection":null,"source_entry":null,"account":"Recorded child sexual abuse material offenses in Lower Saxony rose from 1,084 in 2015 to 7,981 in 2023. The data to review grew from 2.1 to 4.7 petabytes between 2019 and 2023. Since 2020 the police have used two AI tools, Kipo Analyzer and Tracebook Kipo, to pre-select and classify seized images. The state criminal police office (LKA) built them, and four other German states use them too. Lower Saxony's State Audit Office examined their use and reported on it in its annual report, presented to the state parliament on 10 June 2026. It concludes that the tools considerably reduced investigators' workload. It bases this on the Interior Ministry's evaluation of January 2025, in which users rated the software as easing their work. The auditor gives no figure. It also found that the legal basis for retraining the tools lapsed when their project status ended. It warns that without regular retraining the tools may stop working reliably, for example against new file formats or obfuscation.","category":"program","unexpected":false,"purpose":"The Landeskriminalamt Niedersachsen built Kipo Analyzer and Tracebook Kipo to pre-select and classify seized image material as likely child sexual abuse material for investigators to review.","system":"Kipo Analyzer and Tracebook Kipo","model_version":null,"developer":"Landeskriminalamt Niedersachsen (LKA, the state criminal police office)","deployer":"Polizei Niedersachsen (LKA investigations of child and youth sexual abuse material)","location":"Lower Saxony (Niedersachsen), Germany","domain":"Policing / child sexual abuse investigations","segment":null,"benefit_type":"Reduced Task Time","work_activities":["4.A.1.b.1","4.A.2.a.2"],"taxonomy_note":"The auditor also credits pre-sorting with lowering the psychological strain on staff who view abuse images.","registry_ids":{},"ratings":[{"group":"organizational","depth":1,"reason":"The auditor reports a considerable reduction in workload and clear time savings, from users' experience, without a figure."},{"group":"personal","depth":null,"reason":"The auditor states that pre-sorting lowers the psychological strain of viewing abuse images and gives no measure of it."}],"ai_role":{"status":"unassessed","statement":"The workload relief comes from the Interior Ministry's January 2025 evaluation of users' experience, which the auditor adopted. The report gives no figure and no comparison of review with and without the tools. It says that the police trained the tools on a dataset from a criminal case and that they need regular retraining, so they learn from data."},"evidence":[{"kind":"report","citation":"Niedersächsischer Landesrechnungshof. Jahresbericht 2026 zur Haushalts- und Wirtschaftsführung, Beitrag 25, Kinderpornografie mit Künstlicher Intelligenz wirksam bekämpfen. Presented to the Landtag on 10 June 2026. Printed p. 171 (PDF p. 176). The office takes the workload relief from the Interior Ministry's evaluation of January 2025.","title":"Kinderpornografie mit Künstlicher Intelligenz wirksam bekämpfen","url":"https://www.lrh.niedersachsen.de/download/229141/Jahresbericht_2026.pdf","date":"2026-06-10","written_by":"independent","quote":"KI unterstützt die Polizei bei der Aus- und Bewertung von Bildmaterial. Dies führte zu einer erheblichen Arbeitsentlastung."},{"kind":"report","citation":"Niedersächsischer Landesrechnungshof. Jahresbericht 2026 zur Haushalts- und Wirtschaftsführung, Beitrag 25, Kinderpornografie mit Künstlicher Intelligenz wirksam bekämpfen. Presented to the Landtag on 10 June 2026. Printed p. 172 (PDF p. 177). The office relays the Interior Ministry's evaluation of the tools in January 2025.","title":"Kinderpornografie mit Künstlicher Intelligenz wirksam bekämpfen","url":"https://www.lrh.niedersachsen.de/download/229141/Jahresbericht_2026.pdf","date":"2026-06-10","written_by":"independent","quote":"Den Einsatz der KI-Software bewerteten die Betroffenen als arbeitserleichternd. Die KI-Lösungen führten zu einer deutlichen Zeitersparnis und Entlastung."},{"kind":"report","citation":"Niedersächsischer Landesrechnungshof. Jahresbericht 2026 zur Haushalts- und Wirtschaftsführung, Beitrag 25, Kinderpornografie mit Künstlicher Intelligenz wirksam bekämpfen. Presented to the Landtag on 10 June 2026. Printed p. 173 (PDF p. 178). The office found that the legal basis for further training lapsed when the project status ended.","title":"Kinderpornografie mit Künstlicher Intelligenz wirksam bekämpfen","url":"https://www.lrh.niedersachsen.de/download/229141/Jahresbericht_2026.pdf","date":"2026-06-10","written_by":"independent","quote":"Ohne regelmäßiges Nachtrainieren besteht die Gefahr, dass KI-Lösungen nicht mehr verlässlich arbeiten.","supports_benefit":false}],"replication":{"produced_by":["The police used the tools from 2020 to pre-select and classify seized image material for review.","The LKA developed the tools and deployed them across Lower Saxony, and users received special training.","The police trained the tools on a dataset from a criminal case that the prosecutors released for training."],"must_hold":["The tools must be retrained regularly to cope with new file formats, faulty face recognition and obfuscation.","A legal basis must exist for training the tools on data from criminal cases."],"echoes":[]},"paired_incident":null,"headline":"*Kipo Analyzer* eases Lower Saxony police review of abuse images","metric":null,"comparator":null,"later":null,"value":null,"developer_country":"Germany","deployer_country":"Germany","unrated_because":null,"brief_notes":null,"brief":null,"revisions":[{"date":"2026-11-01","change":"Added the record from the report of the Niedersächsischer Landesrechnungshof, the Lower Saxony State Audit Office.","source":"https://www.lrh.niedersachsen.de/download/229141/Jahresbericht_2026.pdf","editor":"AIBD"}],"confidence":"studied","shade":"high","claim_status":"Independently studied","claim_basis":"Sources: one independent report. 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