Confidential Human Source Identity

Detects documents containing the identities of police informants (confidential human sources, confidential / registered informants, registered sources) embedded within criminal organisations. Informant identity is the single most sensitive category of law enforcement information globally. Disclosure has historically resulted in murders and creates immediate lethal risk. Absorbs the former confidential-informant-identities classifier.

Type: keyword_proximity
Engine: universal
Confidence: medium
Confidence justification: Medium confidence: confidential human source management terminology is highly specialised and rarely appears outside genuine law enforcement source handling records. The co-occurrence of CHIS terminology with handler references and source registration numbers is distinctive.
Jurisdictions: global
Regulations: Police Powers and Responsibilities Act 2000 (Qld), Police Service Administration Act 1990 (Qld), Right to Information Act 2009 (Qld)
Frameworks: QGISCF
Data categories: law-enforcement
Scope: wide
Risk rating: 10

Pattern

(?i)\b(?:confidential\s+human\s+source|registered\s+(?:informant|source)|confidential\s+informant|source\s+handler|source\s+controller|informant\s+(?:registration|debriefing|handler|file|agreement|identity)|source\s+identity|covert\s+(?:human\s+)?source|CHIS|human\s+source\s+(?:report|file|record)|source\s+report|source\s+debriefing)\b

Corroborative evidence keywords

PROTECTED, Law-Enforcement, COVERT, RESTRICTED, source reference number, handler, controller, source registration, debriefing, intelligence report, source reliability, QPS, Queensland Police, informant management, source payment, reward payment, CI number, informant number, registered source number, source code name (+41 more)

Proximity: 300 characters

Should match

PROTECTED — COVERT. Confidential Human Source Report. Source Reference: 2024-0893. Handler: Detective Senior Constable M. NGUYEN, Organised Crime Squad. Source reliability rating: B2. Source report: Registered informant advises that the target syndicate will receive a shipment at the Fisherman Islands facility. — QPS confidential human source report with source reference number and handler details
RESTRICTED. Informant Registration Application. Source controller recommendation for registration as a confidential human source. Subject has provided actionable intelligence on three occasions. CHIS risk assessment completed — source is assessed as high-risk due to proximity to violent offenders. Informant debriefing schedule proposed. — Informant registration application with risk assessment
Human source management review. Annual review of registered informant (source reference 2023-0421). Source handler reports continued access to target organisation. Source payment schedule: quarterly payments authorised under informant management policy. Identity protection measures reviewed and confirmed adequate. — Annual review of registered informant with payment and identity protection references
Confidential Human Source Name: Avery Teston Date of birth: 04/02/1991 Reference number: RX22914471 Notes: Confidential Human Source recorded against the subject; handling restricted. — Populated justice record (name, DOB, reference) without source-management evidence - 75
PROTECTED Law-Enforcement. Registered informant file. CI number: 2291 Source code name: KESTREL Handler: Det Sgt R. Walsh, Gold Coast CIB Controller: Insp L. Moreau Source reliability: B2 Access: associate of the target's cousin; attends the Nerang clubhouse weekly. — Registered informant file with labelled CI number, code name, handler and reliability rating (85, absorbed confidential-informant phrasing)
Confidential informant debrief, 03/04/2026. Informant number: 0457. Informant advised that the vehicle is garaged at a Logan address and will be moved on Friday. — Confidential informant debrief with a single labelled informant number (75)

Should not match

The Queensland Police Service published its Policy on Management of Confidential Human Sources, outlining the framework for registering and managing informants. The policy is available on the QPS intranet. — Published QPS policy document about informant management framework
The Fitzgerald Inquiry examined the use of police informants in Queensland and recommended reforms to informant management. The inquiry findings were published in 1989. — Historical reference to published inquiry findings about informant management
A criminology textbook chapter discussing the ethics of confidential human source management in policing. The chapter examines cases where informant identities were compromised. — Academic textbook discussing informant management ethics
Policy guidance: this procedure explains how records about Confidential Human Source are handled, who may access them and how long they are kept. It contains no records about any person or system. — Policy guidance naming the topic without any record (discovery only)
The magistrate was told a confidential informant had tipped off detectives that drugs were stored at the Woodridge property before the search warrant was executed. — Court-reporting style mention of a confidential informant with no identifying fields (discovery only)
Procedure: a registered informant (CI) must be reviewed each year by the source controller, and Chief Inspector (CI) approval is needed before any reward is offered. — Procedure text using bare "CI" in two different senses - bare CI must not act as a source identifier
Informant registration form CI number: ________ Handler: ________ Source code name: [to be allocated] Controller: ________ — Blank registration template - placeholder source fields are rejected

Known false positives

Policy documents describing informant management frameworks Mitigation: Negative keyword exclusion: 'policy', 'framework', 'guidelines', 'standard operating procedure'. Require proximity to actual source reference numbers or personal identifiers.
Historical inquiry reports discussing informant management reforms Mitigation: Negative keyword exclusion: 'inquiry', 'royal commission', 'published', 'recommended', 'findings', 'Fitzgerald'
Academic and legal materials discussing informant law and ethics Mitigation: Negative keyword exclusion: 'academic', 'textbook', 'university', 'journal', 'ethics', 'published'
Media reports about informant-related issues Mitigation: Negative keyword exclusion: 'media release', 'news article', 'reported', 'court heard', 'trial'
"CI" is ambiguous (Chief Inspector, continuous integration, confidence interval, configuration item) Mitigation: Bare "CI" is not a primary or evidence term; it only counts inside a labelled field such as "CI number:" / "CI no:" near a source-management primary phrase.