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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.

• Roger Chappell's Curriculum Vitae

• Services

7/7/2015 · Security

Security Response to a Large Incident: How Much Is Too Much?

By: Roger Chappell

A report of shots fired at the Navy Yard in Washington, D. C. brought a huge response from law enforcement from all areas. The response was immediate and overwhelming. As it turns out, the report was false. The incident remains under investigation at the time of this writing.

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5/26/2015 · Security

Security at Major Events

By: Roger Chappell

Coordinating security for corporate offices, hotels, apartments, convenience stores, and just about every other possible location can have its challenges. Coordinating security at major events, however, is especially challenging. This article will focus on some of the challenges I faced when coordinating security for several events and locations in Houston, Texas for Super Bowl XXXVI.

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5/4/2015 · Police Practices & Procedures

Search Warrant or Consent to Search?

By: Roger Chappell

Not long after I promoted to sergeant, I was training in a patrol division. I was riding with another sergeant when we received a call from two patrol officers. They were at an apartment complex and had chased a male into an apartment. They requested a supervisor go by with them. So, as part of my training, we went.

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4/2/2015 · Police Practices & Procedures

Due Diligence and Eyewitness Identification

By: Roger Chappell

I have read a number of books, studies, and court cases in my career to support the fact that eyewitness identification, by itself, is never sufficient enough to send a person to prison. This is not news. Over the past 20 years, more and more people are being exonerated for violent crimes due to DNA . This article is not to rehash old arguments. Instead, it is more of a reminder to investigators everywhere to not finalize a case, charge a person, and send them to prison based solely on an eyewitness' identification.

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3/26/2015 · Law Enforcement

Law Enforcement: Responding to People in Mental Health Crisis

By: Roger Chappell

During my 22-year law enforcement career, I became involved in countless situations in which I personally dealt with people in mental health crisis. My first incident involved a Hispanic male armed with a pistol. I learned a significant amount from that single incident: so much, in fact, that I made the decision to join the Houston Police Department's Hostage Negotiation Team. The techniques I have learned over the years can be applicable to almost anyone, at any time, in just about any situation. In the following paragraphs, I will recount a few incidents in which I was involved and discuss the techniques used to end each the situation safely. Understand that this is not a specific "how-to guide" that may be applied to every situation. Instead, the use of these techniques will simply allow a person that becomes aware of a certain situation - to be able to attempt to stabilize the incident prior to first responders' arrival.

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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

• View Dr. Ron Martinelli's Biography

• Visit Dr. Ron Martinelli's Firearms Training Website

1/27/2025 · Police Practices & Procedures

Reconsidering Carotid Control

By: Dr. Ron Martinelli

The vascular neck restraint is an effective and safe force option when applied by properly trained officers. Law enforcement is experiencing a dramatic increase in citizen contacts and critical incidents involving violently resistive and or otherwise dangerous subjects who are under the influence of street stimulants and designer drugs such a

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6/26/2017 · Police Practices & Procedures

The "21 Foot Rule" - Forensic Fact or Fantasy?

By: Dr. Ron Martinelli

Officers throughout the United States and perhaps internationally have heard use of force instructors discuss the "21 Foot Rule" during their officer safety, firearms and deadly force training. As both a use of force instructor and practicing forensic police practices expert, I have also trained and testified to this concept myself.

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6/9/2017 · Police Practices & Procedures

Responses to Psycho-Medical Emergencies

By: Dr. Ron Martinelli

On a hot July day, fire and police are called to the home of a 55 year old man suffering from heat stroke. Police arrive first and find the man sitting on a bench in his front yard. When the officers approach the man and ask him to give them his cane, he becomes agitated and non-compliant. One officer suddenly grabs the cane away from the man, who screams and suddenly stands up. The man is tased, taken to the ground, beaten and handcuffed. He is transported to the hospital where ER physicians confirm a diagnosis of heat stroke. The man has no criminal history. He sustains numerous moderate injuries which keep him from returning to work for several weeks. The officers and agency are sued and settle out of court.

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4/25/2012 · Law Enforcement

Law Enforcement: To Chase Or Not To Chase?

By: Dr. Ron Martinelli

An officer detains an active parolee gang member for questioning, and during the detention, the suspect suddenly runs. The officer chases the suspect for two blocks, observes the suspect to be grabbing into his shorts pocket.

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2/15/2012 · Police Practices & Procedures

Murder or Stress-Induced Hypervigilance? Officer Johannes Mehserle and the Infamous "BART Shooting"

By: Dr. Ron Martinelli

On November 5, 2010, Superior Court Judge Hon. Robert Perry sentenced former BART Police Officer Johannes Mehserle to two years in state prison for the January 1,2009, accidental shooting death of 22-year-old Oscar Grant at the Fruitdale BART station.

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11/3/2011 · Law Enforcement

"The Art of Force" - Pre-Contact Threat Assessment

By: Dr. Ron Martinelli

San Francisco Police officers respond to a call of an agitated mentally disturbed and disabled man in a wheelchair wielding a knife and vandalizing parked cars on a downtown city street. A group of at least six uniformed and plain clothes officers locate and surround the man who remains seated in his wheelchair. The officers' initial attempts to communicate with the angry, apparently delusional and armed man prove ineffective.

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9/13/2011 · Law Enforcement

Taser Mentality

By: Dr. Ron Martinelli

An officer responding to a report of a domestic argument between husband and wife observes the husband walking down the street.

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7/15/2011 · Law Enforcement

The Forensic Force Series: Psychophysiological Responses to TASER-ECD Influence

By: Ron Martinelli

One of the most pressing problems within the law enforcement and use-of-force instructor communities is the reconciliation of force deployments with subject noncompliance and resistance.

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The Truth Behind the Black Lives Matter Movement and the War on Police

Dr. Ron Martinelli

A facts-based introduction to the controversial and militant Black Lives Matter political organization and movement written by a nationally renowned forensic criminologist who has been involved in many of the nation's most publicized police-involved death cases. Learn about the movement's founders, ideology, funding sources, surrogates, radical goals and objectives to disenfranchise law enforcement and usurp the rule of democratic law. Several infamous police death cases forensically explained and numerous false narratives of the movement are factually destroyed with explanations of the actual circumstances. This is a powerful, vetted "go to" reference source for researchers, the media, law enforcement and those interested in this radical movement.

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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.

• Brian L. Landers' Curriculum Vitae

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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: