Confidential Human Source Identity

Detects documents containing the identities of police informants (confidential human 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.

Type: keyword_proximity
Engine: universal
Confidence: high
Confidence justification: High 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: PPRA 2000 (Qld), Police Service Admin Act 1990 (Qld), RTI 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\s+handler|source\s+controller|informant\s+registration|CHIS|human\s+source\s+(?:report|file|record)|informant\s+debriefing|source\s+report)\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, investigation, enforcement, prosecution, arrest (+37 more)

Proximity: 300 characters

Should match

PROTECTED — COVERT. Confidential Human Source Report. Source Reference: CHS-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 CHS-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

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

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'