Pepper Spray / Mace / Taser Expert Witnesses: 15

Chief Chet Epperson (Ret.), MBA, has over 38 years of experience as a Law Enforcement / Police Professional for the Rockford Police Department in Rockford, Illinois. Chief Epperson spent 33 years as an active law enforcement officer and 10 of those years as Chief of Police. 

Chief Epperson maintains practical experience as a municipal police chief, implementing several police reforms in his police agency along with accountability processes. He was instrumental in reforming the Rockford Police Department by enhancing its relationship with the community and providing internal and external transparency. Chief Epperson assisted in the formulation of a multi-jurisdictional task force to investigate officer-involved police shootings, in-custody police deaths, and serious uses of force.

Litigation Support - Since 2016, Chief Epperson has been serving as a Police Practices consultant, providing court-appointed expertise in police agency Federal District Court Consent Decrees. He is an expert in applying Constitutional Standards, State Law, policy, and practice to police incidents. Having Instructed courses on police use of force, internal affairs, and discipline, Chief Epperson is qualified to opine on cases of this nature for both plaintiffs and defendants. His police and jail litigation services include thorough reporting, deposition, and trial testimony as needed.

Areas of Expertise:

Police Officer Involved Shootings Police / Jail Use of Force Excessive Use of Force Internal Affairs Supervision

Police Training Police Practice & Policy Police Discipline Police Mental Health Police Auditing

View AGR Police Practice Group's Consulting Profile.

Michael Corbett, CFE, CEDS, CAMS, PI, is an Investigations and Compliance Professional with 35 years of leadership in the conduct, management, and oversight of complex investigations. After more than thirty years with the U.S. Drug Enforcement Administration (DEA) Mr. Corbett offers extensive experience in all phases of investigations to include development of investigative leads; witness identification and interviews; development and management of informants; evidence collection and analysis; operational planning, trial preparation and testimony. He has extensive experience in leading multi-agency, multi-jurisdictional investigations as well as policies, procedures and programs impacting operations.

Mr. Corbett has proven expertise in sensitive international operations requiring close coordination with foreign government officials and agencies and is experienced in working within the diplomatic and consular communities as well as with private sector interests abroad. Experienced in the detection, investigation and mitigation of official corruption.

Areas of Expertise:

Drug Trafficking Money Laundering Police Practices & Procedures Electronic Surveillance International Investigations Police Misconduct Investigations Drugs and Controlled Substances

Drug Enforcement Administration Law Enforcement Tactics Organized Crime Electronic Evidence Discovery Law Enforcement Standards and Practice Surveillance Physical Evidence

Education, Certifications, and Licenses:
Bachelor of Science, Criminal Justice Administration, University of Central Missouri
Certified Fraud Examiner (CFE)
Certified E-Discovery Specialist (CEDS)
Certified Anti-Money Laundering Specialist (CAMS)
Licensed Private Investigator, Owner/Manager of a licensed Texas Investigations Company (State License A04186901)

Dr. Ron Martinelli, is a nationally renowned Forensic Criminologist and a federal/state courts qualified law enforcement and premises liability expert who is also a Certified Medical Investigator (physician's level). He is also a Certified Suicide Investigator. 

Dr. Martinelli directs the nation's only Forensic Death Investigations & Independent Review Team of 26 law enforcement, forensic and medical experts and specializes in officer-involved death cases, civilian self-defense shooting cases and premises liability/security cases. He is a forensic/law enforcement expert to the U.S. Department of Justice, several State Attorney Generals' Offices, numerous major municipalities and nationally prominent private law firms specializing in wrongful death, civil rights and premises liability. 

Dr. Martinelli is the prevailing expert in over 90% of his retained cases. He has saved defendants over $300M and earned plaintiffs over $160 million in jury verdicts and settlements since 2004. He is the media's go-to forensic expert for FOX News, One America News Network, CNN, HLN, Sky News, BBC, NPR, and the History & Discovery Channels. Dr. Martinelli is skilled in crime scene reconstruction, forensics, applied sciences, human factors, psycho-medical emergencies and premises liability and security cases. His unique and extensive field experience, combined his academic and scientific credentials, excellent written reports and persuasive testimony, make him a very appealing expert to attorneys and juries alike.

Areas of Expertise:

• Arrests
• Search & Seizure
• Use of Force / Excessive Force - All Levels and Weaponry
• Officer Involved Shootings(OIS)
• In-Custody Deaths
• Criminal Investigations
• Law Enforcement & Corrections Practices, Training & Supervision
• Adult & Juvenile Corrections
• Law Enforcement Negligence
• Civilian Self-Defense, Premises Liability, Security, Foreseeable Harm
• Insurance Cases
• COVID Detentions & Arrests

David T. Sweeney is a Police Policy and Procedure expert and a 34-year veteran police leader with Oregon State University PD and Seattle PD.  He has decades of experience supervising a large number of sergeants and officers. assisting with expert reviews of policing best practices for pursuits, use of force, security, and a variety of legal standards for police. 

Litigation Support - Mr. Sweeney's goal is to improve best practices in policing by offering expert witness and police consultation services. A trained mediator specializing in workplace conflicts. he provides honest, unbiased opinions. Mr. Sweeney has spent 20 years as a sergeant and lieutenant, responsible for training and reviewing topics such as police pursuits, use of force, de-escalation, police supervision, less lethal weapons, active shooter, SWAT, crowd control, legal standards and more.

 Areas of Expertise:

Police Policy and Procedure Police Pursuits / Collisions Use of Force Less Lethal Weapons Emergency Vehicle Operator's Course (EVOC) Early Intervention Legal Standards for Police De-escalation

Crisis Intervention Equal Employment Opportunity (EEO) Special Weapons and Tactics (SWAT) Police Training Active Shooter Rapid Intervention Internal Investigations Mediation

View David T. Sweeney's Consulting Profile.

Robert T. Johnson is a Law Enforcement Veteran with 32 years of active service. As a retired Lieutenant Colonel from the Illinois State Police, Mr. Johnson continues to serve as a private consultant and expert witness regarding Law Enforcement Policies and Practices most frequently for Use of Force and Police Pursuits but has also testified regarding other police policy & practices issues. He also conducts Sensitive Internal Investigations as an independent investigator for municipalities regarding allegations of Police Misconduct.

Mr. Johnson has extensive experience in Police Administration, Management and Supervision, Criminal Investigations, Use of Force and Officer Invoved Shooting Investigations,Patrol Procedures, Complaint/Internal Investigations and Task Force Operations. Robert Johnson has been qualified as an expert witness in state and federal court. He has consulted and testified for numerous police agencies as well as plaintiffs in litigation regarding the use of force/deadly force, pursuits, emergency vehicle response, and other policy issues. Mr. Johnson has been retained as an expert in well over 150 cases and has testified at several civil trials, State & Federal.

Areas of Expertise:

• Agency Policies, Practices and Customs
• Batons, Flashlights and other Impact Weapons
• Chemical Irritants & Electrical Weapons
• Deadly Force; Shooting Avoidance and Alternatives
• Employee Dishonesty Investigations
• Neck Restraints and Similar Defensive Tactics
• Positional Restraint Asphyxia
• Prisoner Transport, Restraints, Handcuffing and Hog-tying
• Retention of a Known Unfit Employee or Negligent Entrustment of a Weapon
• Search and Seizure
• Standards for Discipline, Internal Affairs Procedures, (In)Adequate Punishment
• Use/Protection of Confidential Informants
• Vehicle Pursuit & Emergency Response Policies & Techniques

View Consulting Profile.

Harry C. McCann, MPA, is recognized as an expert in Policy, Procedure, and Training by the Federal Courts in the Eastern District of Pennsylvania, the Northern District of Georgia, the Court of Common Pleas in Pennsylvania and has provided consultation, expert testimony or reports to law firms, police departments, correctional institutions, and municipalities throughout Pennsylvania, New Jersey, Maine, Maryland, Georgia, Indiana, Kentucky, Arizona,New Mexico and Delaware in the areas of the use of force, in custody death claims, special response teams, arrest procedures, Tasers, training, PREA, classification and legal issues. Background Experience - Throughout his law enforcement career, Mr. McCann has been responsible for the writing and implementation of policy and procedure relating to the Use of Force, Emergency Procedures, Prison Rape Elimination Act, Special Response Team protocols, Staff Training, Patrol Procedures, and Legal Issues. As the prior Director of Law Enforcement / Police Training in Bucks County (PA), the fourth largest county in Pennsylvania, he has been responsible for developing, coordinating, and implementation training programs to approximately 800 police officers representing 42 police departments.

Litigation Support - With 37 years of law enforcement expertise in the federal, state and county level, Harry McCann offers a unique perspective of knowledge and expertise in all facets of training, policy, procedure, and case review. Mr. McCann has continually demonstrated his ability to evaluate the issues and present himself in a clear, concise, thorough, and professional manner. His preparation has been acknowledged among his peers and has been honed by 35 years of college teaching and staff development instruction. He offers guidance and expert reports in matters dealing with:

• Correctional / Police Practices and Procedures
• Police, Correctional, Court Document Interpretation
• Use of Force
• Training Issues and Standards
• DUI Checkpoint Operations
• Wrongful Imprisonment and False Arrest
• Emergency Procedures
• PREA
• Correctional classification
• Police/Correctional Standards

David W. O`Laughlin is an experienced, innovative leader in the world of Law Enforcement Training. Having been directly involved in the training of police officers for more than 35 years, he has obtained certifications in a multitude of disciplines and has become a Master Use of Force Instructor and Force Science Analyst.

Mr. O'Laughlin has recently retired from the Brookline Police Department. As President of the Massachusetts Police Training Officers Association, he was appointed to serve on the Executive Board of the Massachusetts Criminal Justice Training Council by Governor Weld and later appointed to the Committee for Law Enforcement Training and Education by Governor Romney.

As Director of Training for MPI, Mr. O'Laughlin oversees the development and implementation of all training programs and other interests produced by MPI. He is a certified expert in the Use of Force and is a recognized consultant in that discipline.

Litigation Support: David W. O'Laughlin provides expert incident analysis and testifies in both court and deposition in matters of police use of force, up to and including deadly force. His services are available to police agencies, insurance companies, and attorneys representing both plaintiff and defendant.

Areas of Expertise:

Use of Force Deadly Force

Law Enforcement Training Police Practices & Procedures

View David O'Laughlin's Consulting Profile.

Capt. Kenneth M. Sanders has over 30 years of experience in the field of Law Enforcement. The last 15 years, Capt. Sanders served as the Director of one of the largest Police Academies in Louisiana, training approximately 10,000 people per year. Upon retirement, he was the Senior Master Instructor for the state, and responsible for all curriculum development and all instructor development for the entire state.

Internal Auditor / Assessor / Consultant: At the request of law enforcement agencies, jails, and prisons, Capt. Sanders conducts internal assessments for compliance with applicable law, policy, and standards. He also writes and edits new lesson plans, revises existing lesson plans, and works within state agencies as the final editor of legal training for law enforcement academies and officers.

Litigation Support - A Subject Matter Expert, Capt. Sanders has provided expert witness services to private law firms, law firms retained by law enforcement agencies and officers, the FBI, the US Attorney, and the Department of Justice. Representing both plaintiff and defendant, he has been used for Grand Jury Investigations, written opinions, oral opinions, and courtroom testimony. 

Capt. Sanders has been retained in US District Court for cases related to Traditional Law Enforcement, Jails, and Correctional Facilities. Areas of Expertise:

Use of Force Deliberate Indifference Wrongful Death

Law Enforcement Procedures Jail and Correctional Procedures Law Enforcement Training

Walter P. Signorelli, Esq., has over 30 years of experience in the field of Police Policy and Procedure and Police Liability.

Background - During his tenure in the NYPD, Mr. Signorelli held the ranks of Police Officer, Sergeant, Lieutenant, Captain, Deputy Inspector, and Inspector, and served in numerous capacities. In these positions, he conducted or supervised 1,000s of undercover and overt investigations, applications for warrants, the execution of warrants, and arrests. He has also been responsible for the supervision of undercover training, and oversaw activities at the High-Intensity-Drug-Trafficking-Area (HIDTA) training center.

Regarding vehicle-related issues, Mr. Signorelli conducted or supervised numerous investigations of vehicle accidents, police emergency vehicles accidents, police vehicle pursuits, and was a member of various Accident Review Boards. His experience also includes responding to hostage situations, barricaded suspect situations, emotionally disturbed persons, and any police-related shootings.

Mr. Signorelli is currently a practicing attorney, an adjunct professor of law and police science at John Jay College of Criminal Justice, and an author. He has published three books: The Crisis of Police Liability Lawsuits, 2006; The Constable Has Blundered, 2010 (Carolina Academic Press); Criminal Law, Procedure, and Evidence, 2011 (Taylor&Francis, CRC Press).

Litigation Support - Walter Signorelli has been retained as a consultant by both plaintiffs and defense in a number of police liability cases, and has testified as a police procedures expert in both State and Federal courts. He has been prociding expert witness services for over 17 years.

Mr. Signorelli has been retained as an expert approximately 150 times and testified before an arbitrator approximately 25 times. His areas of expertise include:

Deadly Force / Excessive Force Drug Enforcement

Law Enforcement Police Procedures

Robert J. Coventry, Jr., CPP, CHS (III), has over 25 years of experience in the Security, Protection, and investigations field. He has been the Chief Operations Officer, (COO) of Starside Security and Investigation, Inc. (Starside) since 1991. Mr. Coventry is Board Certified in Security Management and a Certified Protection Professional, (CPP) with the American Society for Industrial Security, International. He is a Licensed Private Investigator, holds a Private Patrol Operator License in Arizona and California, and is a Private Investigator Security Manager in Florida. He is also a California Registered Locksmith.

Starside, under Mr. Coventry, has provided Armed and Unarmed Detention Security Officers and Transportation Officers for numerous Governmental agencies and provides security for the financial, entertainment and other commercial industries. He has nationwide and international security consultant experience in Durban South Africa prior to the World Cup, and numerous times in Mexico, France, United Kingdom, Canada, and the Cayman Islands. He has provided executive protection as well as armed and unarmed uniformed security and patrol services in both the public and private sectors. Recognized for his expertise, Mr. Coventry sits on Advisory Boards for California State University, Fullerton's Private Investigation and Security Program and Grossmont College Adult Corrections Academy.

Litigation Support - Mr. Coventry has been serving as a Security / Use of Force expert witness throughout his career. His services are available to attorneys representing plaintiff and defendant and include consulting, investigations, case Review, arbitration, and testimony.

Areas of Expertise:

Bank Security Bars / Lounges / Night Clubs Deadly / Excessive Force Hospital Security Inadequate / Negligent Security

Private Investigators Security Guards Security Management Special Event Security Workplace Violence

View Robert Coventry's Consulting Profile.

Dr. Roy G. Taylor is a current Chief of Police with over 40 years of experience in a wide-range of federal, state, local, and private criminal justice positions. Dr. Taylor specializes as an expert witness in Police Practices and Procedures and Law Enforcement and Criminal Justice. Current Positions:

• Chief of Police Blue Ridge Public Safety (2014)
• President/CEO Signal 88 Security of Charlotte (2012)
• President/CEO Capitol Special Patrol (2012)
• Chief of Police Capitol Special Police (2002)
• Lt. Colonel – Provost Marshal, Army National Guard (2000)
• Antiterrorism / Emergency Management Branch Chief DoD (2007)
• Provost Marshal Joint Civil Support Task Force, Joint Chiefs of Staff (2014)

Litigation Support - Dr. Taylor is called upon to analyze cases from both defense and plaintiff perspectives. His services include case review, written reports, deposition, and trial testimony as needed. 

Areas of Expertise:

Police Standards & Practices Use of Force & Deadly Force Electronic Control Devices Standards of Conduct High Speed Vehicle Pursuits & Chases Law Enforcement Policies and Procedures

Failure to Train Law Enforcement Malpractice Failure to Supervise Violations of §1983 Civil Rights Personnel Selection & Retention Police K-9

View Roy Taylor's Consulting Profile.

Beth A. Mohr, CFE, CAMS, CCCI, MPA, PI, is a Law Enforcement / Police Misconduct expert with over 30 years of sworn and non-sworn investigative experience. Ms. Mohr is a Certified Fraud Examiner, Certified Anti-Money Laundering Specialist (CAMS), and a Certified Cyber Crimes Investigator (CCCI). She is also a Private Investigator licensed in New Mexico, Arizona, and California.

During her career with the San Diego Police Department, Ms. Mohr she was awarded three Commanding Officer’s Citations, which are the highest awards offered by the San Diego Police Department.  After retiring from the San Diego Police Department, she conducted death penalty mitigation investigations, and other complex felony investigations, including homicide and white-collar cases, for the Whatcom County, Washington, Public Defender’s Office.   This includes conducting investigations of allegations of police misconduct for the City of Albuquerque Independent Review Office.  Ms. Mohr recently chaired the City of Albuquerque’s Police Oversight Board, a civilian board which was created as part of the US Department of Justice’s Consent Decree with the City of Albuquerque and the Albuquerque Police Department. 

Ms. Mohr has taught courses on law enforcement topics including interviewing techniques, investigative ethics, evidence collection, financial and fraud investigations, and many other topics.  Her ethics courses, investigative courses, and fraud courses are certified by the State of New Mexico for law enforcement credit, and she is a POST Certified law enforcement instructor in California.

Litigation Support - Beth A. Mohr is available as a consulting or testifying expert anywhere in North America.  She is neutral, fair, and her opinions are rooted in provable facts.  She strives to balance her cases between defense and plaintiff-sided cases, and also provides habeas consulting services.  Ms. Mohr has testified as an expert in New Mexico, Arizona, California, and Washington state, in federal and state courts, on a variety of subjects, including police procedures, police misconduct, white collar crime and fraud examinations. 

Areas of Expertise:

Police Misconduct Use of Force Interviewing, Interrogations Police Ethics Investigative Failure Habeas Consulting False Arrest Failure to Train / Failure to Supervise

Evidence Handling Civilian Oversight Civil Rights Violations Police Policy, SOPs Fraud Embezzlement Cases Money-Laundering Cases Cryptocurrencies / Bitcoin

Emanuel Kapelsohn is an internationally recognized Firearms Training and Use of Force consultant who has instructed thousands of police and security officers, federal agents and others throughout the U.S. and abroad since 1980. A graduate of Yale University and Harvard Law School, he is a practicing attorney in addition to his consulting work. 

As vice president of the Internat’l Assoc. of Law Enforcement Firearms Instructors, Mr. Kapelsohn is a certified in force science and shooting scene reconstruction, and as an instructor in numerous law enforcement disciplines. He is a featured presenter at national and international instructor conferences. He has authored over 130 published articles, is Associate Editor of "Standards & Practices Guide for Law Enforcement Firearms Instructors," and principal author of "Firearms Training Standards for Law Enforcement Personnel," and "Guidelines for Simulation Training Safety." 

Mr. Kapelsohn testifies as an expert witness in civil and criminal cases in state and federal courts nationwide, and has testified by invitation before both houses of Congress. 

Testimony on the Following Subjects:

Gun Accidents Firearms Safety Gun Handling Procedures Gun Storage Firearms Design Operability Trajectories Velocities Ballistics Ejection Patterns - Ricochets Proximity Testing Gunshot Evidence

Bullet Wounds Reconstruction of Shooting Scenes Bullet Penetration Shooting Range Safety Hunting Accidents Holsters and other Shooting Products Self Defense Knives and other Weapons Involuntary Muscular Contraction and Accidental Discharge Police and Security Firearms Training Tactics and Procedures Use of Force

View Emanuel Kapelsohn's Consulting Profile.

Adam Bercovici has almost 40 years of experience in the Police and Security field. Mr. Bercovici spent 30 of those years with the LAPD, 20 as a supervisor and manager. He is currently a retired LAPD lieutenant and former security company CEO.

Background: Mr. Bercovici's leadership assignments included the Criminal Investigation Section- Major Crimes Division-The Joint Terrorism Task Force, The FBI Violent Crime Task Force ( where he supervised the FBI Fugitive Task Force), The Special Investigation Section, and Homicide Special Section. 

Since 2012, Mr. Bercovici has worked as a licensed private investigator and subject matter expert and consultant in areas of Police Practices and Complex Police Investigations. His clients have included major law firms, insurance companies and corporations.

In the entertainment industry, Mr. Bercovici has been an on-air talent, producer, and script and story consultant.  He was the Co-Talent on The History Channel Series JFK Declassified-Tracking Oswald. He is currently the Technical Consultant for the ABC Network series Stumptown. His cases have appeared in the Los Angeles Times, and on the CBS Network.

Litigation Support: Adam Bercovici splits his work between defense and plaintiff. He has been retained by major civil rights firms, major municipalities and their legal counsel, plaintiff attorneys, city attorneys, and criminal defense attorneys. Mr. Bercovici accepts work based on the merits of the individual case.

Areas of Expertise: 

Police Use of Force Security Guard Operations Police Pursuit Policy Crowd Control Wrongful Death Criminal Conspiracy Public Safety Employment Private Investigator Best Practices

Active Shooter / Terror Incidence Kidnapping Special Undercover Tactics Complex Police Investigations Homicide Investigations K9 Operations Premises Liability Brady Issues

Michael J. Canaan, CPP CFLC, is a Premises Liability Expert Witness with over 45 years of experience in military and civil law enforcement, as well as corporate and private sector security and investigative positions.

Assignments have taken him from the Bering Sea to Southeast Alaska, across Canada and the United States, to countries in Central and South American in case venues ranging from educational settings, amphitheaters and stadiums, nightclubs and sports bars, ships, casinos, retail environments, food processing facilities, malls, and shopping centers.

Expert cases have involved evaluating failure to meet best practices, duty or standard of care in areas such as:

• Inadequate or negligent hiring, retention, training, supervision, staffing, and terminations
• Use of force or excessive force, threats, harassment, and intimidation
• Inadequate or non-non-existent policies and procedures, post orders
• Assaults, voyeurism, rape, sexual assault, robbery, shootings, stabbing, and homicide
• Security technology integration, improper or inadequate physical security infrastructure or systems installation
• Workplace violence

Mr. Canaan has worked over 35 expert cases, with testimony experience in both deposition and trial.

He is Board Certified in Security Management by the American Society for Industrial Security, International. ASIS is the largest professional security practitioner association with over 38,000 members worldwide, of which only 2200 have received this prestigious certification. Mr. Canaan is also a Certified Forensic Litigation Consultant with the Forensic Expert Witness Association.

View Michael Canaan's Consulting Profile.