Police - Law Enforcement Expert Witnesses: 24

Aaron T. Olson, has decades of experience in the field of Police and Human Resources. His foundation of knowledge and skills comes from a career in law enforcement, and being a college educator, expert witness, consultant, and trainer.

Mr. Olson's company, A.T. Olson Consulting, LLC,  is certified by the U. S. Department of Veterans Affairs Center for Verification and Evaluation (CVE) as a Verified Service-Disabled Veteran Owned Small Business (SDVOSB); and the State of Oregon's Certification Office for Business Inclusion and Diversity (COBID) as a Service-Disabled Veteran Business Enterprise (SDVBE) and Emerging Small Business (ESB).

Background Experience: Mr. Olson has 26 years of police experience with the Oregon State Police managing assignments in communications, recruitment, and patrol. He supervised and evaluated both police and non-police employees. He was a member of the OSP Procedures and Rules Advisory Committee and worked with Oregon's Department of Justice legal team in rewriting and validating OSP's trooper and cadet applicant hiring process. 

 As a patrol supervisor, Mr. Olson directed major crime scenes and motor vehicle fatalities investigations. He reviewed and approved administrative, police, and use of force reports. He investigated allegations of police officer misconduct, conducted background checks, and participated in specialized tasks in community policing, dignitary protection with the U.S. Secret Service and other law enforcement agencies. In his tenure he had experience in police pursuits, the use of physical force and deadly force and next-of-kin death notifications.. 

Mr. Olson is a former human resources investigator with Local Government Personnel Institute, Salem, OR. He conducted background and misconduct investigations on city and county employees and city and county elected officials, as well as city police chiefs. His misconduct investigations included sexual harassment, discrimination retaliation and hostile work environments. He wrote the investigative reports and made the findings of facts on all misconduct allegations.

Mr. Olson is a published co-writer of Multicultural Law Enforcement: Strategies for Peacekeeping in a Diverse Society, 7th ed. Pearson Prentice Hall, and Multicultural and Diversity Strategies for the Fire Service, Pearson Prentice Hall. Further, he is an adjunct college professor teaching Civil Liability in Criminal Justice courses. 

Litigation Support: Mr. Olson meets the criteria of an expert witness as outlined in the Federal Rules of Evidence. He has experience in offering expert opinions on cases involving police misconduct, police procedures, police and non-police use of force, police pursuits; employer investigations on state and county employees; and cases involving negligent hiring, negligent training, negligent supervision, negligent retention, management performance and retaliation. Mr. Olson's services are available to attorneys representing plaintiffs and defendants and include diagnostics, thorough reporting, depositions, arbitration hearings, and trial testimony as needed. His hourly fee is $200.00 and his retainer is $2,500 which is applied to his consultation services.

Areas of Expertise:

View Aaron T. Olson's Consulting Profile.

Chief Chet Epperson (Ret.), MBA, has over 40 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:

View AGR Police Practice Group's Consulting Profile.

Marlon Marrache, Police Sergeant (Retired), JD, is a highly effective Law Enforcement Professional with exemplary skills in Police Administrative Discipline / Misconduct and Use of Force Investigations. 

Mr. Marrache is a 24 year veteran and has over 12 years of Police Misconduct Investigation, adjudication, and examination experience. He has been assigned to Internal Affairs as an Associate Advocate conducting Board of Rights Hearings, and to Officer Representation Section defending police officers. Mr. Marrache has:

• Demonstrated expertise in Peace Officer Bill of Rights Act (POBRA)
• Demonstrated expertise in Police Mediation (i.e., Biased Policing Complaints)

Litigation Support - Mr. Marrache is Subject Matter Expert in Administrative Police Misconduct and a Subject Matter Expert in Categorical Use Of Force Investigations with an emphasis in Officer Involved Shootings (OIS). He provides Expert Testimony in Internal Affairs investigations and renders fair, reasonable, and impartial recommendation on "adjudication" and "penalty" of completed investigations.

Areas of Expertise:

Degrees and Certifications - Supervisory CA POST certificate - Certified LAPD Instructor - Juris Doctorate Degree from Pacific Coast University School of Law. Mr. Marrache has instructed in LAPD supervisor school on the topic of POBRA & Use of Force
  

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:

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)

Donald L. Leach, II, is a Jail / Corrections Management expert with over 30 years of experience. He has 20 years of consulting experience on jail management issues nationally, focusing on Risk Management for Jails and Jail Operational Methodology. 

Mr. Leach has extensive supervisory experience, having overseen up to 402 employees (indirectly). He also supervised internal affairs investigations, experienced in interviewing, hiring, training, scheduling, motivating, evaluating, and dismissing personnel. He is experienced in administering and managing a large detention facility, developing and administering programs, budgeting, contract development and monitoring, conducting research, monitoring compliance with policies and procedures, community relations, public speaking, controlling costs, problem-solving, and preparing reports.

Litigation Support - Mr. Leach has served as an expert witness for 5 years, in both State and Federal court. His services are available to counsel for both Plaintiff and Defense and include case review, testimony, and consultation for jail and prison issues.

Areas of Expertise:

View Donald Leach's Consulting Profile.

Dr. Ron Martinelli, PhD, CMI-V, 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:

View David T. Sweeney's Consulting Profile.

Rachael Frost, Master Inv. (ret.) is a VIOLENCE RECOGNITION & RESPONSE SPECIALIST with over 20 years of experience in law enforcement practices and procedures investigation, domestic violence-related persons' investigation and policies, grants, and program development. She was the Riverside Sheriff’s Department’s first expert witness in domestic violence and developed a self-sustaining program in the Department to encourage future witnesses and abuse specialists.

Ms. Frost is currently a Sexual Assault Expert Cadre of Experts for End Violence Against Women International and a grant writer for more than $4 million in grant monies and programs to develop these areas of recognition, investigation, and response. She is also a Masters staff member for the Training Institute of Strangulation Prevention, works with the Communications Committee for the Association of Threat Assessment Professionals, and is Chief Financial Officer for the non-profit Kids Court, which addresses trauma concerns of children who are involved in the court system.

Ms. Frost evaluates and reviews Law Enforcement Policies and Procedures having worked in personnel and policy cases with Internal Affairs and as a program and policy developer. Her expertise has been used in high-profile cases involving law enforcement procedures. She specializes in case preparation for Intimate Partner Violence Issues in Family, Civil, and Criminal court, including how domestic violence may affect children and law enforcement responses and investigation practices into abuse and threat cases. She is the Abuse and Law Enforcement Investigations Specialist hired by attorneys across the nation.

Ms. Frost has the direct experience needed in court; working in the field with victims of abuse and in Internal Affairs thoroughly investigating policy violations. Comfortable on the witness stand, she has testified numerous times as an expert witness for prosecution and defense, respondent and plaintiff in Family, Criminal, and Civil cases, because true testimony does not change dependent on your client. She has conducted hundreds of investigations into abuse and law enforcement related cases. Rachael Frost - Expert Witness Website.

Expert witness services in the areas of law enforcement response to:

View FROST ICED'S Business Consulting Profile.

Brian L. Landers has nineteen years in Law Enforcement as well as over 25 years in law enforcement training and education, including experience as a police and jail academy director and a full-time criminal justice professor.

Experience: As a law enforcement officer, Mr. Landers started his career in patrol and K-9 and was promoted to supervision as a sergeant and eventually as a lieutenant in charge of the agency's training and hiring procedures. 

Mr. Landers has over 25 years of experience in law enforcement training, including 12 years of criminal justice training. He served 3 term as Mayor of the City of Wisconsin Dells and 3 terms as County Board of Supervisors (Columbia Co.WI). He has participated on the Wisconsin DOJ Tactical Advisory Committee and Wisconsin DOJ Ethics Advisory Committee. He was a Wisconsin Criminal Justice Coordinators President and also served on the Wisconsin Legislature 911Committee.

Mr. Landers frequently serves as a media consultant on police and criminal justice issues for ABC, NBC, CBS, and Fox News affiliates.

Litigation Support - Mr. Landers' expert consulting and testimony is primarily focused on federal civil rights cases. His clients include both plaintiffs and defendants and he has been counted on to serve as an expert in high-profile cases. His services include thorough reporting, depositions, and trial testimony as needed.

Areas of Expertise:

Certification:

View Brian L. Landers' 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.

Victor Lofgreen, PhD has over 30 years of experience and education in the fields of Corrections and Community Development. He is a prison and jail consultant who conducts cases analysis and develops reports to support litigation on prison and jail issues. Experience - Dr. Lofgreen has served as the CEO of a State Adult Correctional Institution and the Division Chief of a State Planning Agency for Corrections. He has authored numerous professional papers and articles on topics within his area of expertise as well as Agency Policy and Procedure Manuals and training materials. Litigation Support - Dr. Lofgreen's expertise is in Jail and Prison Policy and Procedures related to the standard of care for inmates by local, State, and Federal correctional agencies. His services are available to counsel representing plaintiff and defendant and include case review, case study and data analysis, report of Expert Opinion based on the evidence included in the case study, deposition, and trial testimony as needed. Areas of Expertise:

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

William G. McDonald, PhD, has over 25 years of experience in Emergency Medical Services (EMS) and Emergency Management, primarily as a Paramedic, Educator, and Administrator.

Dr. McDonald serves as a NYS DOH Certified Instructor Coordinator, Regional Faculty member, and a Nationally Certified EMS Educator. In his last role, he was an Assistant Professor of Emergency Management and Public Affairs as well as Program Coordinator for all Emergency Management and Fire related courses at the State University of New York, Empire State College. Dr. McDonald is also a subject matter expert for the NREMT and is a psychomotor exam evaluator.

Dr. McDonald holds a BPS in Emergency Management and Fire Protection from SUNY, Empire State College, a Master's Degree in Public Administration from Columbia Southern University, and a Ph.D. in Public Policy and Administration from Walden University. He is a 2013 Fellow of the Academy of Emergency Management, 2014 graduate of the Harvard John F. Kennedy School's Executive Leadership program, a 2018 Certified Emergency Manager, and a 2018 Fellow of the American College of Paramedic Executives.

Litigation Support - As Principal Consultant of McDonald Public Safety Consulting, LLC Dr. McDonald provides expert witness services to attorneys and government entities for primarily EMS, Healthcare, and other Public Safety related cases. Services include document review, depositions, and trial testimony as needed. 

Areas of Expertise:

View McDonald Public Safety Consulting. LLC's Business Consultant Profile.

Michael Levine is one of the most decorated Supervisory Agents in the history of the Drug Enforcement Administration. A US Law Enforcement Procedure Expert, Mr. Levine has many decades of courtroom experience (civil & criminal) as a Trial consultant and Expert Witness, including 25 years of service with DEA, Customs, BATF, and the IRS Criminal Investigations Division. Mr. Levine's supervisory and other law enforcement experience includes being in command of task force units combining officers of FBI, BATF, IRS, Customs, NYPD and other police agencies, service as an Internal Affairs supervisory investigator, a senior inspector with the Department of Justice OPR, Office of Professional Responsibility, and Director of a sheriffs department drug bureau. 

Mr. Levine, during his decades of trial experience, both as a senior law enforcement officer including the past 30 years as a professional trial consultant, has qualified as an expert witness for both prosecution and plaintiff as well defense, in federal and state courts including 19 states, Puerto Rico and 8 foreign nations. He offers full trial consulting and investigative services in both criminal and civil matters as follows: Expert Witness File Review and Strategy Assessment; Case Particular Design of Cross-Examination "menus"; Investigative, Technical and Research Support; Expert Witness Report and/or Affidavit Preparation. Utilizing his extensive experience as a Supervisory Internal Affairs Investigator, he can also identify the elements of probable cause indicative of false reporting, cover-up, and the concealment of Brady materials. Since the year 2007 he has been retained by the Atlanta and DeKalb County District Attorneys Offices, to conduct police-involved shooting reviews and as such has testified before criminal grand juries leading to the indictment and conviction of law enforcement/violators. 

Mr. Levine specializes in full trial consulting services and expert testimony in criminal and civil matters and has testified as an expert in the following areas of expertise:

A listing of his cases may be found on his website www.policetrialexpert.com.

Michael Levine is the only US law enforcement expert ever admitted to testify before a Japanese court, (Japan v Goldstein) and used the Blind Mule Defense, which resulted in an acquittal. He is a best-selling author, media consultant, lecturer and police instructor with extensive experience as court-qualified expert witness and trial consultant in civil and criminal matters.

Since leaving the Department of Justice, he has been retained in excess of 500 occasions as a trial consultant/expert witness throughout the United States, Canada, England and Japan. Mr. Levine has also remained active as a police instructor in the US, Canada and Australia. In January of 2008, his police instructional manual "Undercover Tactics and Informant Handling" previously written for the Department of Justice, was published by the New York State Department of Justice Services and utilized as an instructional manual for New York State law-enforcement. The manual was subsequently edited and republished by the US State Department for the instruction of Brazilian Federal Police which was conducted by Mr. Levine and his team of US-based experts. The manual was subsequently republished via academia.edu from where it is now among the top .05% of Global downloads by police agencies, attorneys and researchers.

 View Michael Levine's Consulting Profile.

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:

View David O'Laughlin's Consulting Profile.