Jails - Prisons - Correctional Facilities (General) Expert Witnesses: 11

Joseph E. 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. 

After retiring from the FBOP in 2007, Mr. Gunja has been providing correctional consultation and expert witness 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. 

Litigation Support - Joseph Gunja has an over 90% success rate in all cases he has been retained as an expert, both working with plaintiffs and defendants, as well as several cases of sentencing mitigation or reductions.  While some cases were settled in lieu of court, the settlements were all in favor of the attorneys or firms he represented. He offers advice, expertise, and expert testimony for a variety of issues in matters pertaining to: 

View Simco Correctional Consulting's Business Consulting Profile.

Paul M. Adler, DO, FACEP, MBA, Medical Director for the Ventura County, California, Department of Corrections, has worked in Correctional / Jail / Prison Medicine & COVID-19 Preparation & Response. He has overseen the care of inmates in Jails in California and New York, as well as Prison inmates who have been transferred to county facilities to serve their terms for years in county jails in California. He has also overseen Correctional health car in locked units in Hospitals . 

Dr. Adler is the President-Elect of The American Correctional Health Services Association of California / Nevada, which represents all clinicians and administrators in Jails/Prisons in California and Nevada. He previously oversaw a County Hospital, County Nursing Home and ran a County Health Department and oversaw Correctional healthcare for the Westchester, New York Jail.

Litigation Support - Dr. Adler has defended Jails and Prisons in Southern California, Idaho, Texas, North Carolina, New York, Pennsylvania, etc. He is currently the expert consultant to the California Prison System for Covid litigation and the medical consultant to the judicial consent decree overseeing care in the Philadelphia Department of Prisons. He also served as the expert consultant to the ACLU for Covid in the Illinois Department of Corrections

Dr. Adler still works as a full-time practicing physician and has helped attorneys and insurance companies in Emergency Medicine, Nursing Home Medicine, Public Health and Hospital Administration since 1985. He has been involved in Plaintiff litigation in many states including against Rikers Island, NY and Cook County Jail and is available to review and consult on clinical Correctional/Jail/Prison cases for attorneys for both Plaintiff and Defense.

Services:

• COVID-19 Preparation & Response
• Medical Oversight of Federal Consent Decrees
• Screen Cases for Merit
• Review, Analyze and interpret Medical Records
• Provide Basic or Comprehensive Written Reports
• Interpret Standards of Care, Deviation and Adherences as they Relate to Correctional Health Care
• Develop Chronological Time Lines
• Policy and Procedure Development

Chief Chet Epperson (Ret.), MBA, has over 42 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.

Dr. John R. Black is a recognized expert with extensive experience in international, federal, and state courts on Lethal Force, Police Use of Force, Officer-Involved Shootings, and Civilian Self-Defense, blending forensic analysis with human-centered perspectives and systems thinking. Dr. Black employs a systems thinking approach that enables him to view incidents from multiple perspectives. He regularly speaks to Police leadership, investigators, lawyers, and organizations about how we think about the process of inquiry, our biases, and our sensemaking.

Litigation Support - Dr. Black is qualified as an expert witness in state and federal courts related to police practices, police use of force, decision-making, officer-involved shootings, police tactics, police training, incident command, and police / jail operations. He is also qualified with similar expertise for civilian self-defense and use of force events.

Expert in Use of Force & Lethal Force Incidents & Decision-Making

In cases involving force--lethal force, understanding decision-making is as critical as the facts themselves. Whether you are a defense attorney explaining your client’s actions or a prosecutor challenging them, you need an expert who integrates both events and decision-making processes. Dr. Black offers a unique approach, blending quantitative precision with qualitative insight into how individuals make sense of their world. he is a recognized expert with experience in international, federal, and state courts on lethal force, police use of force, officer-involved shootings, and civilian self-defense. He combines forensic analysis with human-centered perspectives, ensuring a balanced view that benefits both defense and prosecution.

Advanced Forensic Video and Qualitative Analysis

Video evidence often plays a pivotal role in determining the facts. Dr. Black is skilled in forensic video analysis, using Amped Five software to extract key details. What sets him apart is his ability to combine video analysis with qualitative thematic tools like Atlas.TI, understanding both what happened and how individuals interpreted their environment under stress.

Cognitive Interviewing and Human Performance Expertise

Dr. Black specializes in cognitive interviewing, exploring clients’ mindsets during critical moments leading up to the use of force. His approach bridges the quantitative analysis of human performance with qualitative insights into violent encounters, offering a comprehensive view of why actions were taken.

Military and Law Enforcement Expertise

With 30+ years in U.S. Army Special Forces and 23+ years in law enforcement, Dr. Black brings unmatched experience to each case. He provides practical insights grounded in real-world experience. His background ensures a comprehensive understanding of how policy, training, and decision-making intersect under pressure.

View Aragon National, Inc.'s Consulting Profile.

Dr. Randy Atlas AIA , CPP is a Registered Architect, NCARB certified, and he practices Criminal Justice Architecture and Environmental Security Design. Atlas is a certified protection professional (CPP) with the American Society of Industrial Security (ASIS), and is an appointed member of the ASIS Security Architecture and Engineering Committee. Atlas has his doctorate in criminology and a masters of architecture. Dr Atlas is a Fellow  member of the American Institute of Architects (AIA).

Dr. Atlas has taught CPTED (Crime Prevention through Environmental Design) and criminal justice courses at Florida International University, Florida Atlantic University, and the University of Miami, Keiser University, and he is a trainer with the National Crime Prevention Institute at the University of Louisville. Dr. Atlas has been a technical Assistance consultant with the National Institute of Justice, National Institute of Corrections, and the Florida Department of Corrections and U.S. HUD Drug Elimination CPTED Program.

He has conducted ADA accessibility compliance audits for private and public sector clients, and served as an expert witness on over 200 premises liability lawsuits.

Dr. Atlas has been a speaker and trainer at security conferences from New Delhi, India to Seattle, Washington and has written over 200 articles in various publications on security, safety, and counter terrorism issues.

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) 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 $600M and earned plaintiffs over $280 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

My name is David T. Sweeney.  I am a Police Policy and Procedure expert and a retired 34-year veteran police leader with Seattle Police and Oregon State University PD.  I have decades of experience supervising a large number of police officers and supervisors. I am currently employed as adjunct faculty in the School of Police Staff and Command at Northwestern University. I enjoy assisting with expert reviews of policing best practices for a variety of legal standards for police departments. As an expert witness, I have been pleased to work with both plaintiff and defense attorneys. I will give you an honest assessment of your case, so that I can provide the best reports and helpful testimony. I have experience with 41 total cases: 16 defense cases and 25 plaintiff cases.

Litigation Support - My goal is to improve best practices in policing by offering expert witness and police consultation services. I am also a trained mediator specializing in workplace conflicts. I provide honest, unbiased opinions. I will be happy to review and discuss your case. I will point out strengths and weaknesses of the case, and we can work on next steps, whether it be further case review, expert report, deposition, or trial testimony. I have spent 21 years as a sergeant and lieutenant, responsible for training and reviewing topics such as police pursuits, use of force, police tactics, de-escalation, police supervision, less lethal weapons, active shooter, SWAT, crowd control, legal standards, EEO, Human Resources, U.S. 1983 cases, and more.

 Areas of Expertise:

View David T. Sweeney's Consulting 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.

Dr. Pia Quimson-Guevarra is Board-Certified in Psychiatry and Forensic Psychiatry by the American Board of Psychiatry and Neurology. She opines about psychiatric issues in civil litigation, employment matters, and criminal cases. She has extensive experience with diagnosis and treatment of depression, anxiety, bipolar disorder, PTSD and other factors of emotional distress, both as a treating physician and in medical-legal cases. She serves as a forensic consultant, and/or disclosed Expert Witness. She assesses competency and undue influence,  standard of care, and mental status re judgment and clarity of thinking. Applies to civil, probate and CTST criminal matters including criminal responsibility. She is also experienced in treatment of psychotic disorders,  hallucinations, and delusions.

She opines about medication or drug impact on behavior.

Dr. Quimson-Guevarra conducts IMEs and review of medical and legal records. Her assessments are thorough and inform thoughtful and objective expert opinions issued by verbal and written report and testimony. She conducts Independent Medical Evaluations face-to-face in person and by video.

She is a Certified Forensic Evaluator in Oregon.

Dr. Quimson-Guevarra's clinical practice in Portland is Quimson Behavioral Health, providing psychiatric patient care, medication management, and psychotherapy, for patients who suffer from mental disorders, e.g., Anxiety, Depression, Bipolar Disord & PTSD and medication management. She continues to use her expertise in psychopharmacology to treat mental health conditions in the context of medicolegal medically complex cases.

Prior to expanding her private practice, she was a psychiatrist at Cascadia Behavioral Healthcare, in an Assertive Community Treatment (ACT) team, a method to deliver an intensive level of services to patients in the local community. Her patients consisted of individuals who suffer from severe and persistent mental illness.  At Cascadia, she also treated patients with a history that includes forensic medical-legal issues.

Previously, Dr. Quimson-Guevarra treated patients who suffered from anxiety, mood, and psychotic disorders at Cedar Hills Hospital, Multnomah County Detention Center, Washington County Jail, Snake River Correctional Institute, and the Portland Veteran's Administration. 

Dr. Quimson-Guevarra has served as a forensic consultant for the Washington County Mental Health Court in Oregon. She also has worked in the forensic evaluation service department at the Oregon State Hospital where she performed forensic evaluations.

Sanjay Adhia, MD, MRO, is triple-Board-Certified in Psychiatry, Brain Injury Medicine, and Forensic Psychiatry. In addition to forensic/expert witness practice, Dr. Adhia treats patients at renowned TIRR Memorial Hermann Hospital. His forensic practice focuses on the psychiatric impact of personal injury, medical malpractice, Multi-Plaintiff and Toxic Tort cases, testamentary capacity, undue influence and Dementia, TBI Brain injuries, competency, mental illness and complicating medical conditions. 

Dr. Adhia is among one of a select few Forensic Psychiatrists co-Board-Certified in Brain Injury Medicine. 

Dr. Adhia treats and opines about Traumatic Brain Injury (TBI) in litigation as it can result in psychiatric or neurocognitive impairments. He always assesses for Malingering.

In addition, Dr. Adhia works with Physicians for Human Rights to assess victims of kidnapping and false imprisonment, human trafficking, undue influence, physical and sexual abuse, rape, and fear of imminent death. 

In all populations, he assesses PTSD, Anxiety, Depressive Disorders, risk of suicide, and malingering. 

He is experienced in the treatment and impact of drug and alcohol abuse on decision-making. Dr. Adhia has also treated severe psychosis (Schizophrenia, hallucinations) and psychopathology. He formerly treated patients at a Maximum Security Prison and prison psychiatric hospital. 

Dr. Adhia’s findings consider complicating factors, e.g., emotional distress worsened by active physical and mental conditions, and pre-existing mental and physical illness (e.g. depression, PTSD, Dementia, Alzheimer's, medication.) 

As a physician, Dr. Adhia is uniquely qualified to review and examine and incorporate medical records and doctor reports in his reports. This is especially important in medical-malpractice & standard of care cases in treaters, inpatient, rehab, hospital, government, corrections and psychiatric hospitals. Dr. Adhia is skilled in these med-legal issues. 

He conducts Independent Medical Examinations, review of records, and reports findings to courts and attorneys. He is available to testify in civil, criminal, probate, Federal, Immigration, military, and administrative jurisdictions.

Kerry Mendes, M.D., Child, Adolescent and Adult Forensic Psychiatrist joined Dr. Adhia in 2022.