Police - Law Enforcement Consultants: 14

SIMCO specializes in Jail, Prison and Corrections Expert Witness and Consultation Services.  Founder, Joseph Gunja is a Jails, Prisons and Corrections Expert with more than 30 years of experience in the corrections industry.

Mr. Gunja had a distinguished career with the Federal Bureau of Prisons (FBOP) for over 28 years serving as a Correctional Officer, Shift Supervisor, Investigator, Captain, Associate Warden, and Warden at three complex correctional facilities. He also served as Regional Director of the Western Region for over 2 years and was assigned to the FBOP's Headquarters in Washington, DC where he was responsible for authoring national policy and official publications, providing technical expertise to the Assistant Director of Correctional Programs and facility Wardens, Associate Wardens, and Captains. 

Mr. Gunja also served as the Keynote Speaker and Trainer at the FBOP's Management and Specialty Training Center on a monthly basis After retiring from the FBOP in 2007, Mr. Gunja has been providing correctional consultation services. In addition, he has worked for two of the largest private corrections companies, CCA and GEO Group, as Warden at the Northeast Correctional Center in Youngstown, Ohio, and the Great Plains Correctional Facility in Hinton, Oklahoma. 

Consulting Services Include:

Correctional Management Inmate Care Prison Security

Critical Incidents Prison Emergency Response Correctional Policies & Procedures

View Joseph E. Gunja's Expert Witness Profile.

Aaron T. Olson of A.T. Olson Consulting, LLC., began as a consultant in August of 2003. His specialization is Expert Witness Opinions on Police Practices, Human Resource Practices, Private Investigations, and customized training. One of his produced training videos is Seeking Excellence in Employee Relations which consists of three parts. Part One, Part Two, and Part Three. 

Consulting Services: Diversity in Employment Equity in Employment Inclusion in Employment Workforce Policies Conflict Resolution Mentoring Team Building

Training Services: Cross-Cultural Communications Cultural Diversity Awareness and Competency Customized Training and Curriculum Design Leadership and Management Public speaking Report Writing Train-The-Trainer

Background Experience: Mr. Olson has 26 years of police experience 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 in rewriting and validating OSP's trooper and cadet applicant hiring process. Mr. Olson had the honor of being a member of the first Oregon State Police Affirmative Action Recruiting Team. 

As a patrol supervisor, Mr. Olson directed major crime scenes and traffic fatalities investigations. He reviewed and approved administrative, police, and use of force reports. Mr. Olson also 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 reaching out to new immigrants and refugees, Mr. Olson initiated the "Police and Emergency Services" workshops at the Immigrant Refugee Community Organization (IRCO) in Portland, Oregon. 

Mr. Olson is a regular adjunct professor at Portland Community College (PCC), Portland, Oregon, and Eastern Oregon University (EOU), La Grande, Oregon. At PCC, Mr. Olson currently teaches cultural diversity and civil liability online  criminal justice classes. At EOU, he teaches an online multiculturalism in emergency services course. He established history by designing the first cultural diversity courses and curricula for PCC's criminal justice program in 2001, fire protection program in 2009, and EOU's fire service administration program in 2011.

Besides being an expert witness, Mr. Olson is a private investigator. He is insured and bonded, and licensed through the Oregon Department of Public Safety Standards and Training, Private Investigator License #113509.   

Mr. Olson has experience in providing his consultation and training services to businesses, hospitals, and government at the city, county and state level.    

Mr. Olson is a published co-writer of  CARE Approach: Seeking Solutions to Human Problems, Kendall Hunt Publishing, 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.

Contact Mr. Olson today for a free initial consultation.

View Aaron T. Olson's Expert Witness Profile.

AGR Police Practice Group provides robust professional Policing Services to a mix of criminal justice entities and communities. AGR counsels and collaborates with organization leadership on risk management strategies, setting the highest Law Enforcement Performance Standards. They have the proven professional law enforcement experience.to achieve case-specific goals. 

Consulting Services:

• Organizational Assessments - Policy Model Review & Future Impact

Create sound and robust policies and practices for police leadership to advance a department’s ability to deliver the highest quality services to the community. AGR has experience with single – agency police implementation and reviewing national police organization model policies. 

• High-Risk Investigations - Independent Monitoring. Oversight. Auditing

Has a crisis, such as a police shooting or police misconduct, resulted in the loss of community trust and placed the agency on the defensive? AGR has broad experience in assisting agencies in complex and sensitive investigations.

• Auditing and Inspections - Enhance Accountability, Reduce Liability, Improve Compliance

Ensuring your police agency is doing what they say they are doing, by providing auditing and inspection services.

Chief Chet Epperson, (Ret.), MBA, principal of AGR, is a law enforcement veteran with over 40 years of active service. He served with the Rockford Illinois Police Department for 33 years and the last 10 years as chief. Chief Epperson serves as an expert with two Federal Police Consent Decree Monitoring Teams with special emphasis on use of force, police shootings, training, and policy oversight.

View Chief Epperson's Expert Witness Profile.

Aragon National, Inc.'s consulting extends to complex decision-making processes within Law Enforcement and Military Operations, and Health Analytics, and related Social Determinates (systems approach/ complexity / wicked problem approach). Aragon explores the link between visualizing intelligence, giving it meaning (sensemaking), critical thinking, insight generation, and decision-making.

Areas of Expertise:

Systems Thinking Sensemaking Complexity / Wicked Problems Big Data (visualization to insight) Intelligence

Data Driven Decision Making Socio-cultural Intelligence / Information Modeling Physical UoF Events Human Performance Video Analysis

Dr. John R. Black, President, has over 30 years of experience including International Humanitarian Assistance and Disaster Relief (HA/DR), DoD Joint Technology Research Evaluation and Development, and the extraction of practical insight from Intelligence in support of Strategic Decision-making. He regularly speaks to police leadership, investigators, lawyers, and organizations about the process of inquiry, biases, and sensemaking.

Dr. Black (ret) has over 23 years of experience in law enforcement operations, including patrol, corrections, investigations, training, and command, combined with over 30 years with U.S. Army Special Operations and Peacekeeping (Special Forces, Civil Affairs, and Psychological Operations.

View Dr. John R. Black's Expert Witness Profile.

ConsulTex and Associates is a Houston based security consulting company that provides security strategies for individual clients, law enforcement, and corporate security clients. ConsulTex is available nationwide to answer questions regarding security measures, or offer solutions that fit their clients' needs.

Services Include:

• Expert Witness Analysis
• Use of Force
• Police Procedure and Practice
• Security Tactics and Policies
• Training and Speaking Engagements

Principal, Roger W. Chappell, has over 25 years of experience in the Law Enforcement and Security industry. A 9 year Marine Corp Veteran, he is also a former corporate security manager, police crime prevention specialist, detective supervisor, police training manager, and internal affairs sergeant.

As Security Management Professional, his background includes an advanced 22-year law enforcement career with the highly regarded Houston Police Department. He received over 40 awards in that capacity, including supervisory and civilian commendations.

Mr. Chappell has more than 20 years of training and “hands on” experience evaluating, developing, and managing security and crime prevention programs. He coordinated numerous security related functions at hotels, bars and night clubs, and apartments. Mr. Chappell has handled large events during the Super Bowl, MLB All Stars, and NCAA Final Four events. He was also a hostage negotiator for over 12 years responsible for the safe resolution to highly stressful and violent events.

Roger Chappell has served as both a private sector security consultant and a public sector Master Peace Officer. He has earned a stellar reputation as an expert in hostage negotiation and received the prestigious Hostage Negotiator of the Year award in 2013.

View Roger Chappell's Expert Witness Profile.

Donald L. Leach, II, is a Jail / Corrections Management expert with over 30 years of experience. Mr. Leach has 20 years of consulting experience on jail management issues nationally, focusing on Risk Management for Jails and Jail Operational Methodology. His clients have included the Department of Justice, Ministry of Justice, The Netherlands, National Institute of Corrections, American Jail Association, Voorhis-­-Robertson Justice Services, among others. 

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. 

Consulting Services:

• On-site Facility Evaluation of Jail Management Systems and Classification Systems
• Data and Information Systems Analysis
• Developing / Enhancing Jail Classification Programs

Mr. Leach also provides Training Seminars in developing and implementing jail classification systems and risk management methodologies. Training topics include:

• Objective Jail Classification
• "Objective Reasonableness" in Jail Use of Force
• Managing Inmate Behavior in Jails
• Managing Gay, Lesbian, Transgender, and Intersex Inmates
• Reasonable Management of Suicide in Jails
• Reasonable Use of Restraints in Jails and Prisons

View Donald Leach's Expert Witness 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) and 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 $650M and earned plaintiffs over $290 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 officer-involved shootings, in-custody deaths, 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
• Human Factors

Dr. Mayer is an independent consultant and scholar that (for identification only) holds the position of Visiting Fellow in Human Flourishing,  Harvard University. He has been a full-time tenured professor with recent appoints in statistics, biostatistics, epidemiology, biomedical informatics, public health and medicine (psychiatry). He held various titles including, Professor (Part-time), Bloomberg School of Public Health and School of Medicine, Johns Hopkins University, Affiliated Professor, Mayo Clinic/ASU joint program in Biomedical Informatics, a member of the Research Staff at Mayo Clinic, and Professor at Arizona State University. 

Dr. Mayer continues to do research and mentor young physicians and medical students while doing a limited amount of consulting in epidemiology, biostatistics, statistics, observation studies and clinical trials. His consulting projects often focus on model development, execution and inferences. He is one of the few MD/PhD epidemiologists. He led a  group of 6000 physicians and epidemiologists that reviewed the science of COVID-19 

Brian L. Landers has 20 years of Law Enforcement experience, 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.

Mr. Landers holds a Masters Degree in Public Administration, a Bachelor's Degree in Criminal Justice, and is pursuing his PhD in Forensic Psychology at Walden University. He also holds multiple certifications as a Master Trainer for law enforcement topics and use of force. 

 Mr. Landers frequently serves as a media consultant on police and criminal justice issues for ABC, NBC, CBS, and Fox News affiliates. He was elected to three terms on the Columbia County Board of Supervisors (WI) and three terms as Mayor of the City of Wisconsin Dells. His trusted knowledge and experience have been recognized by those he has served in all capacities, and his expansive background has propelled him to be an incredibly reliable, trustworthy, and confident consultant.

A full-time educator and trainer, Mr. Landers' services include:

Consulting - Performance and Personnel Evaluations

Research - Use of Force Concepts, Training Guidance, and Policy Revisions

Training - Use of Force Concepts, Policy Training, and Training Curriculum Services

Certified Law Enforcement Instructor Certified Defensive Tactics Instructor Certified Firearms Instructor Certified Tactical Response Instructor

Certified Evidence Technician Certified ECD Instructor Certified Scenario-based Training Instructor Certified FBI Hostage Negotiator

View Brian L. Landers' Expert Witness Profile.

Timothy A. Dimoff, CPP, is a nationally recognized authority, consultant, author and trainer offering total package solutions relating to employee issues including workplace violence, substance abuse, management training, FLMA /discrimination issues, bullying, sexual harassment, documentation procedures, liability reduction, hiring/firing and pre-employment screening procedures, corporate investigations, internal theft, and security analysis/vulnerability assessments. 

As founder and president of SACS Consulting & Investigative Services, Inc., one of the nation’s leading security consulting firms, Mr. Dimoff has over 40 years of experience in Security and Human Resource matters serving both the public and private sectors. He is multi-certified in the security field. He is board certified by ASIS as a Certified Protection Professional (CPP?) which is internationally recognized as the “gold standard” certification for security management professionals, demonstrating their knowledge and competency in seven key domains of security. 

Mr. Dimoff is also an A.L.I.C.E Certified (Alert, Lockdown, Inform, Counter, Evacuate) Training instructor; a member of InfraGard, a joint professional organization between the FBI and security professionals to work collectively against crime, terrorism and to improve educational abilities and knowledge for the private sector; a member of NOITR, a joint professional organization between the Secret Service and IT security professionals to work collectively against crime, terrorism and improve educational abilities and knowledge for the private sector with emphases in the IT and internet areas; and is a member of the American Society for Industrial Security (ASIS). 

Mr. Dimoff has written dozens of security-related articles and has authored four books. He also provides media commentary and profiling analysis for TV, radio, internet and print media worldwide. He holds a Bachelor of Science Degree in Sociology with an emphasis in Criminology from Denison University. 

Areas of Expertise: 

Security / Law Enforcement Policies and Procedures Aggressive Behavior Human Resources Policies Successful Hiring Practices Violence Free Firing Practices Terminated Employee Risks

Physical Security Vulnerability Assessments Diversity and Discrimination in the Workplace Drug and Alcohol Abuse Issues Identifying High Risk Employees Defusing Difficult People Workplace Theft

View Timothy A. Dimoff's Expert Witness Profile.

Second Look Training and Forensic Consulting, LLC is a veteran owned and operated business developed to provide quality Investigative Training for Detectives, Crime Scene Investigators and Prosecutors. All of their instructors are experienced detectives or crime scene analysts, most are published, all have been recognized in court as expert witnesses in their respective field of expertise, and each has already provided training to law enforcement and forensic professionals. Their training is based on investigative experience, sound investigative, forensic principles, and the latest forensic techniques.

List of Courses Offered:

Investigating Staged Crime Scenes Forensic Aspects of Death Investigation Bloodstain Pattern Analysis Investigating Sexual Assault Cases

New Detective Course Child Abuse Investigations Digital Evidence for Law Enforcement College Enrichment Courses

Principal, Arthur S. Chancellor is a Law Enforcement Expert with over 40 years of experience, including 30+ years as a Special Agent, supervisor, and Commander with the US Army Criminal Investigation Division. He is currently an Instructor and Consultant at Second Look Training and Forensic Consulting, LLC.

Mr. Chancellor has personally investigated or supervised several thousand felony investigations which occurred on a military base or in the civilian community. He has processed over 200 homicide death scenes and qualified multiple times as an expert witness in the area of Crime Scene Analysis and Crime Scene Examination. 

Mr. Chancellor's focus in the last 15 years is on death and sexual offenses. His specialty is Staged Crime Scenes also known as Staging which is a crime scene alteration made by an offender to misdirect a criminal investigation. His most recent consultations have centered on homicides staged to resemble some other event or in false sexual assaults.

View Arthur S. Chancellor's Expert Witness Profile.

SecureLaw LLC is a Security & Legal Consultancy providing substantive, corrective strategies, designed to address, and remedy criminal acts and problematic behaviors along with limiting liability exposures. SecureLaw’s cutting edge, dynamic and effective solutions are tailored to specific needs, combining legal, financial, and organizational implications associated with each remedy.

Dr. James F. Pastor, Ph.D., JD, CPP, Principal at SecureLaw LLC, brings a unique and remarkable decades long year career in Policing, Public Safety, and Security, starting as a tactical officer in Gang Crime Enforcement for the Chicago Police Department, one of the most active policing units in the country.

As a security expert, author, attorney, and former professor, Dr. Pastor merges security methods, academic theories, and legal principles; providing an exceptional level of depth and breathe to any case. As an attorney, he served and advocated for police unions, and for both security guard and electronic security firms, providing broad experience into the security industry and public safety. 

Augmented with a doctorate in Public Policy Analysis, he understands that policies create incentives and drive human behavior. As these directly impact public safety and crime, few possess his experience, his unique insight and his security sense.

Consulting Services:

• Security Law Counsel - Dr. Pastor provides support to corporate counsels, or in some cases directly to corporate decision makers, depending upon the circumstances. His deep understanding of both legal principles and security methods couples with an intuitive security “sense” derived from decades of public safety and security experience provides a unique perspective that deliver results results that are concrete, actionable and effective.
• Terrorism & Extremism / Lawlessness: Indicators & Assessments - Through his experience as a tactical police officer in the gang crime unit in Chicago that provided a perspective few possess, Dr. Pastor has also devoted thousands of hours studying, training and researching this crucial and timely threat and tactic. He has written extensively on this topic, including two books foreshadowing today’s disruptive environments: Terrorism and Public Safety Policing  and You Say You Want a Revolution: A Compelling & Cautionary Tale of What Lies Ahead.
• Risk Management & Security Liability - Dr. Pastor utilizes performance-based and industry-specific risk assessment methodologies designed to deter, detect, delay and response criteria for protecting assets. His timely and appropriate security policies and protocols, security technologies and risk management techniques  reduce liability exposure and enhance the protective environment. Significant Projects.
• Private Police Consulting - SecureLaw LLC tackles the problem left when municipal governments are faced with difficult budgetary decisions along with increased fear and crime. Those who are ready to respond with innovative, thoughtful solutions like private policing, are the change agents who will lead the way during this transition in policing and public safety. The Privatization of Police in America
• Accomplished Speaker - Dr. Pastor has broad and deep expertise on a variety of security and public safety issues. As an accomplished author, he is also a gifted, passionate speaker. If you are interested in engaging, please view a List of Topics.

View Dr. James F. Pastor's Expert Witness Profile.

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. He delivers comprehensive and intelligent Law Enforcement and Security Services to federal, state, and local governments, and is authorized to work on private or government properties including parks, any government owned buildings, land, public housing communities, hospitals, schools, or similar areas. 

Dr. Taylor's experience and expertise includes use of force and firearms instruction; recruiting, selection and assignment; employee supervision, evaluation and retention; curriculum development; policies and procedures design and implementation; canine utilization; budgeting; public relations; and emergency management. 

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)

Specific Services:

Mobile Patrol Stationary Guard Alarm Response Residential and Commercial Business Checks ATM / Bank Escorts VIP / Management Escorts Investigations Arrest of Violators

Hostile Employee Terminations Emergency Response Planning Site Security Assessments Crime Prevention Seminars Anti-Terrorism Instruction Community Policing Programs In-Service Law Enforcement Training Public Relations

View Roy Taylor's Expert Witness Profile.

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. He currently serves as a consultant to

• Manufacturers of Firearms and related products regarding design, human factors, safety and training issues; product literature including warnings and owner's manuals; development of user, instructor and armorer training programs, materials and training aids; marketing issues; and risk management
• Cities, States, and Governmental Entities regarding development, review and implementation of use of force policies, law enforcement training programs and issues, response to critical incidents, and risk management
• Law Enforcement and Security Agencies regarding selection of firearms and related equipment; design and implementation of training programs; safety surveys and safety protocols; qualification standards; development and review of written departmental firearms and use of force policies; and evaluation of specific use of force incidents and firearms accidents

A graduate of Yale University and Harvard Law School, Mr. Kapelsohn is a practicing attorney in addition to his consulting work. As vice president of the Internat’l Assoc. of Law Enforcement Firearms Instructors, he is a certified in force science and shooting scene reconstruction, and as an instructor in numerous law enforcement disciplines. 

Mr. Kapelsohn 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."

View Emanuel Kapelsohn's Expert Witness Profile.