Business Details
38 Years
experience
Trusted Private Investigation Services in Philadelphia
Keystone Intelligence Network has been a trusted provider of investigative, security, and training services since 1988. Our team of seasoned professionals, with over 125 years of combined experience, delivers solutions to private sector clients, law enforcement agencies, and governmental entities worldwide. We specialize in complex domestic and international investigations, supported by a global network of former federal agents and associates. Our Philadelphia-based headquarters has served as a hub for innovation in forensic psychophysiology, polygraph testing, and interrogation techniques for over three decades. We maintain licensing as Private Detectives in New Jersey and Pennsylvania while operating subsidiaries in Cairo and Singapore. Our Academy for Scientific Investigative Training (ASIT) has trained polygraph examiners across six continents, establishing us as leaders in forensic credibility assessment.We provide expert testimony in criminal and civil cases across multiple jurisdictions and have developed proprietary methodologies like the Integrated Zone Comparison Technique. Our client roster includes Fortune 500 companies, major law firms, and municipal agencies, reflecting our reputation for integrity and excellence. We maintain official polygraph service contracts with the Philadelphia Police Department and SEPTA Police Department, underscoring our institutional trustworthiness. Through continuous global expansion and client referrals, we've maintained leadership in private investigation, polygraph testing, and forensic training markets.
Services
Investigative Services
Polygraph Testing
Forensic Auditing
Executive Protection
Security Personnel
Training Programs
Fraud Investigations
Applicant Screening
Forensic Interviews
International Investigations
Details
- Year established: 1988
Highlights and features
- We offer 35+ years of experience in forensic psychophysiology and interrogation techniques
- Our team includes former federal agents with global investigative networks
- We maintain official polygraph service contracts with Philadelphia Police Department
- We developed proprietary methodologies like the Integrated Zone Comparison Technique
- Our Academy for Scientific Investigative Training operates in 15+ countries worldwide
Associations and certifications
- Licensed Private Detectives in Pennsylvania
- Licensed Private Detectives in New Jersey
Services
Investigative Services
Our investigative services combine global reach with specialized expertise in fraud detection, forensic auditing, and complex case resolution. We deploy experienced professionals with law enforcement backgrounds to handle corporate, legal, and governmental investigations. Our network spans multiple continents, enabling comprehensive domestic and international case management.
Polygraph Testing
We provide certified polygraph examinations using proprietary methodologies developed by industry pioneers. Our examiners hold international accreditations and serve as official screening providers for major police departments. The service includes pre-test interviews, data analysis, and expert court testimony when required.
Forensic Auditing
Our forensic auditing service specializes in uncovering financial discrepancies through detailed analysis of records and tax documentation. Certified professionals with IRS experience handle complex cases involving offshore accounts, business disputes, and regulatory compliance investigations.
Executive Protection
We offer professional executive protection services including risk assessment, threat mitigation, and secure transportation. Our trained personnel serve high-profile clients and corporate executives with customized security solutions for both domestic and international assignments.
Training Programs
Our Academy for Scientific Investigative Training delivers specialized programs in polygraph techniques, interrogation methods, and forensic analysis. The curriculum includes basic and advanced courses recognized by law enforcement agencies worldwide, with training locations across six continents.
People
Nathan J Gordon
President and Founder
Internationally recognized polygraph expert with over 35 years in forensic psychophysiology. Developed multiple interrogation techniques and authored leading industry texts. Holds advanced degrees in criminology and psychology.
William L. Fleisher
Director
Former FBI and U.S. Customs agent with expertise in behavioral analysis and organized crime investigations. Recipient of U.S. Customs Distinguished Service Medal. Co-author of interrogation methodology texts.
Benjamin J. Redmond
Executive Director
Retired IRS Inspector General with 25 years federal experience. Oversees investigative operations and law enforcement liaisons. Former police association president with extensive regulatory compliance expertise.
Darrell G. O'Connor
Director of Special Operations
45-year investigative veteran with experience in federal agencies including the FBI and TSA. Specializes in security protocol development and high-risk operations management for government and private sector clients.
Tuvia Shurany
International Director of Operations
Former head of Israeli government polygraph department with 12,000+ examinations conducted. Oversees Latin American operations and training programs. Recipient of American Polygraph Association's Motsinger Award.
Questions
What investigative services do you offer?
We provide fraud investigations, forensic auditing, polygraph testing, executive protection, and international case management services for corporate, legal, and government clients.
Are your polygraph examiners certified?
All examiners receive training at American Polygraph Association and International Society of Polygraph Examiners accredited schools and maintain active professional certifications.
Do you operate internationally?
Yes, we conduct investigations and training programs across six continents with permanent subsidiaries in Cairo, Egypt and Singapore.
What training programs are available?
Our Academy offers basic and advanced polygraph training, interrogation techniques, and forensic interview courses recognized by law enforcement agencies worldwide.
How do you handle corporate investigations?
We deploy experienced teams using forensic accounting and document analysis to uncover financial misconduct while maintaining strict client confidentiality protocols.
What security services do you provide?
We offer executive protection, event security, and risk assessment services with professionally trained personnel available for domestic and international assignments.
