VECCHI GROUP INTERNATIONAL
Threat Consulting, Training & Expert Witness
Dr. Gregory M. Vecchi, Ph.D. — retired Chief of the FBI Behavioral Science Unit — delivers court-tested forensic analysis and expert testimony for high-stakes litigation, alongside threat consulting and training for organizations.
Explore Our ServicesFBI
Behavioral Science Unit Chief
DHS
Certified Master Trainer
Ph.D.
Published Researcher
29+
Years Federal Service
6
Published Books
29+
Years Combined
Federal Service
Federal Service
The Expert Behind VGI
Decades of Federal Experience, Now in the Courtroom
Dr. Gregory Vecchi built VGI on a career spent at the front line of behavioral threat assessment — as Chief of the FBI's Behavioral Science Unit, a certified DHS master trainer, and a published researcher in violence prevention and crisis negotiation.
Today he serves as an independent expert witness in civil and criminal litigation, and delivers threat consulting and training to corporations, schools, government agencies, and security teams.
Education
Ph.D.
Federal Service
FBI BSU Chief
Certified
DHS Master Trainer
Member
ATAP · ASIS
EXPERT WITNESS
Court-Tested Analysis for High-Stakes Litigation
Dr. Vecchi's primary practice — independent forensic analysis and expert testimony in civil and criminal matters, built to withstand aggressive cross-examination.
Case Types
Premises liability and negligent security, workplace and targeted violence, use-of-force, and tactical negotiation.
Methodology
Daubert-ready analysis grounded in peer-reviewed frameworks — ANSI/ASIS, ATAP, Pathway to Violence, and WAVR-21.
Publications & Media
Peer-reviewed books, chapters, and articles, plus national media commentary on threat and targeted violence.
ALSO FROM VGI
Consulting & Training
Beyond expert witness work, VGI delivers threat consulting and training across prevention, intervention, and response — including Rapid Action Tactics (RAT) for individuals and teams.
THREAT PREVENTION
Threat Prevention Consulting & Training
Increase your ability to identify, assess, and manage people who may pose a threat. Our courses are based on empirical research and evidence-based best practices.
- ✓VGI Behavioral Threat Detection Certificate
- ✓VGI Behavioral Threat Assessment Certification
- ✓VGI Behavioral Threat Detection & Assessment Instructor Certification
THREAT INTERVENTION
Threat Intervention Consulting & Training
Improve your ability to interact with and safely engage potentially violent individuals before a situation escalates.
- ✓De-Escalation and Crisis Intervention
- ✓Engaging Individuals with Mental Illness and Personality Disorders
THREAT RESPONSE
Threat Response Consulting & Training
Equip yourself with the knowledge to swiftly and effectively handle dangerous situations and protect lives.
- ✓Situational Awareness and Pre-Attack Behaviors
- ✓Escaping, Evading, and Engaging Targeted Violence
ALSO FROM VGI
The RAT System
Rapid Action Tactics is VGI’s hands-on self-protection system — nine focused modules you can train one at a time. It starts with the core concepts and the law of self-defense, moves through perception, avoidance, and verbal de-escalation, and ends with unarmed, stick, knife, and firearm response. Short, topic-specific courses for individuals, teams, and organizations.
C-RAT
Concepts
L-RAT
Legal
P-RAT
Perceptive
A-RAT
Avert
T-RAT
Talk
F-RAT
Fight
S-RAT
Stick
K-RAT
Knife
G-RAT
Gun
OUR APPROACH
Grounded in Proven Frameworks
Every VGI course and consulting engagement is built on peer-reviewed, field-tested threat assessment frameworks and standards.
Federal Daubert Standards
Analysis aligned with Federal Rule of Evidence 702, ensuring testimony meets the relevance and reliability thresholds set by federal courts.
ANSI/ASIS International Standards
Premises security and risk assessment evaluated against the consensus standards published by ASIS International.
ATAP Guidelines
Threat assessment and management aligned with the Association of Threat Assessment Professionals best practice guidelines.
Pathway to Violence Model
Behavioral progression model used to identify warning behaviors and pre-incident indicators along the pathway to targeted violence.
WAVR-21
Workplace Assessment of Violence Risk — a 21-item structured professional judgment instrument for evaluating workplace and targeted violence risk.
Behavioral Influence Stairway Model
The FBI Crisis Negotiation Unit framework (BISM) for de-escalation and behavioral change through staged active listening, empathy, and rapport.
Testimonials
Trusted by Counsel & Colleagues
“
Ready When You Are
Strengthen Your Threat Posture Today
Tell us about your organization and your goals. We'll recommend the right mix of consulting and training to keep your people safe.
Book a Consultation
Typical response within 1 business day