The world's most comprehensive directory of private investigators and related professionals
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thePIdirectory is the world's oldest, largest and most comprehensive directory of private investigators, forensic examiners, scientific experts and other investigative specialists.

A wide range of investigators and specialists available!
Choose from an extensive range of investigative specialists, experts and services, including missing persons locators, surveillance operatives, undercover agents, polygraph examiners, fingerprint technicians, computer forensics specialists, DNA / paternity testing, handwriting analysis, drug screening, and other specialized fields.

Please click on the type of specialist or service you require from the icons below:

Polygraph Examinations, Lie Detection Testing
Child Abuse
Undercoer agents
Voice Stress Analysis
Audio Enhancement
Interviewers and interrogators
Asset Locators
Computer Forensics
Person Locators
Photograph and Image Enhancement
Document Examiners
Background Checks and Screening
Drug / Narcotic
Drug Screening
Collection Agency
Process Servers
Specialty Cameras
Ballistics and Firearm Analysis
TSCM and De-Bugging
DNA / Paternity Testing
GPS Tracking Vendors
Covert Couriers
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