Violent Crime Expert Witnesses

Anchorage, Alaska

Neurophysiology, Forensic Science - Neuroscience, Psychoactive drugs, Traumatic brain injury, Violent behavior, Alcohol blackout, Consciousness, Altered states of consciousness, Memory, Criminality, Intentionality, Crime scene, Neuropsychology, Sleep, Victimology, Bloodstain pattern analysis, Homicide, Suicide, Violent crime

Dr A. E. Du Beau, PhD, MS, BS, is a neuroscientist with special expertise in forensics. Neuroscience investigates all aspects of the brain’s functionality, inclusive of neurochemical and anatomical processes that underlie behavior, perception, cognition, mentation and consciousness. Dr Du Beau’s neuroscientific expertise includes altered states of consciousness and sleep, alcohol blackout, psychoactive drugs, traumatic brain injury, memory processes, intentionality, violence and criminality. For contrast, psychologists and psychiatrists are clinicians who are principally focused on the mental state of any given patient, diagnostics and establishing a therapeutic relationship. Conversely, neuroscience uses an analytical approach to understanding how the brain works. Dr Du Beau’s doctoral research at the prestigious University of Glasgow (Scotland, United Kingdom) investigated the neurochemical properties of neural systems using an array of sophisticated laboratory, surgica...

Fort Lauderdale, Florida

Law Enf & Criminal Justice, Investigation - Case Review, Corruption, FCPA, Crypto currency, Elder Abuse, Money Laundering, Violent Crime, CPA, Ponzi Scheme, Health Care Fraud, Financial Crime, Anti-Trust, Securities Fraud, Bank Fraud, Criminal Defense, Organized Crime, White Collar Crime, Asset Tracing, Whistelblower, Litigation Support

R.W. “Rick” Simpson is a retired FBI Supervisory Special Agent who spent the final three years of his career leading the Miami International Corruption Squad which investigated FCPA, Kleptocracy, and Anti-Trust matters reaching to the highest levels of country and corporate governance. In this role, Mr. Simpson developed excellent working relationships with top prosecutors and law enforcement officials in multiple countries and gained substantial experience navigating the complexities of multi-jurisdictional investigations. His 26-year FBI career included significant time serving in Los Angeles, FBI Headquarters, Washington DC, and Miami. He joined the FBI with a CPA background, having worked as a Controller for a group of structured finance corporations. Throughout his FBI career, Mr. Simpson made extensive use of sophisticated investigative techniques while conducting numerous high profile organized crime, financial crime, and money laundering investigations. He has testified as ...

Mableton, Georgia

Premises Liability, Security - Premises Liability for Negligent Security, Use of Force, Apartment Complexes, Violent Crime, Security Guards, Gas Stations, Security Negligence

Charlie is the founding partner of Group Nine Risk Consulting, a firm specializing in security risk management, forensic consulting, and security training. He founded Group Nine Risk Consulting following a long and successful military and federal law enforcement career that spanned nearly 30 years. Charlie was employed by the U.S. Marshals Service (USMS) for 25 years, retiring as a Supervisory Deputy U.S. Marshal in January 2022. During his career with the USMS, he was responsible for numerous aspects of security risk management including exterior perimeters, access control, security assessments, managing security personnel, security awareness training, video surveillance, protective intelligence, and workplace violence prevention at several federal courthouses around the country. His work with the USMS often involved proactively identifying, investigating, and mitigating threats to the life and safety of hundreds of federal judicial personnel across numerous federal facilities an...

Buford, Georgia

Premises Liability, Security - Premises Liability, Violent Crime, Security Negligence, Security Guards, Gas Stations, Convenience Stores, Apartment Complexes, Retail Establishments, Night Clubs, Parking Lots, Forseeability

Mark is a Senior Consultant with Group Nine Risk Consulting, specializing in security risk management, expert witness testimony, forensic consulting, and security training. He joined the firm following a distinguished 25-year federal law enforcement career, earning recognition for his contributions to national security and investigative leadership. As a Special Agent with the Federal Bureau of Investigation (FBI), Mark led high-profile investigations into financial crimes, public corruption, organized crime, and counterterrorism. His exceptional work earned him the FBI Director’s Award twice, a testament to his investigative expertise and leadership. Before joining the FBI, Mark served as a Special Agent with the U.S. Air Force Office of Special Investigations (AFOSI), where he conducted investigations into violent crime, narcotics trafficking, and counterintelligence. He also spearheaded Red Team Operations to identify and address facility and operational security vulnerabilities....

Milligan, Tennessee

Police Practices & Procedures, Law Enf & Criminal Justice - criminal investigation, crime scene analysis, crime scene reconstruction, use of force, death scene, homicide, murder, shootings, self defense, USCCA, NRA, rape, sex crimes, sex offense, sexual assault, violent crime, robbery, police practices, composite sketch

Dr. Ken Lang is a retired 25-year law enforcement veteran with extensive criminal investigation experience who holds a Ph.D. in Criminal Justice and teaches various criminal justice and investigative courses. Lang’s career began with the Havre de Grace Police Department in 1989. He served as a patrol officer for two years until he became employed by the Baltimore County Police Department (BCoPD) in 1991, where he served for the next 23 years. Lang’s police career centered on criminal investigations, dedicating 15 years to investigating violent crimes of rapes, robberies, and murders, and 5 years investigating property crimes. In addition to his primary detective assignment, Lang also served as a certified Maryland Police and Correctional Training Commission adjunct police instructor at the BCoPD Academy for 16 years, teaching recruit classes and in-service training sessions. Courses taught included Sex Crimes Investigations, Investigative Resources, Basic Investigator’s Courses...

McKinney, Texas

Security, Premises Liability - Inadequate/Negligent Security, Hotel/Motel, Safety/Security, Security Procedures, commercial buildings, Crime Foreseeability, Assaults, Battery, Rape, Robbery, Murder, Parking Lot, Apartments, Violent Crime, Workplace Violence, Wrongful Death, OSHA, emergency/crisis, premises security liability

Vince Vittatoe, CPP, CSC, CPTED, is the Principal/CEO at Vittatoe Consulting, LLC, independent security management and forensic consulting practice focused on providing clients security and loss prevention expertise to help protect their employees and customers. With over 30 years of combined law enforcement and corporate safety, security, and loss prevention experience, we offer our clients direction and advice from our experience in both the public and private sectors. After college, Vince worked for State Farm Insurance as an accounting supervisor before joining the Dallas Police Department in 1988, serving as a police officer and divisional defensive tactics instructor. Upon returning to the private sector, Vince entered the hospitality industry and gained operations experience as an Area Manager for Motel 6, responsible for twelve motels. Next, Vince moved to the corporate office of Accor North America as the Director-Safety & Security. Vince held safety, security, and los...