Subject Matter Expert Consulting Services Advance your case based on current Canadian and international training standards, operational practices, tactics, medical and legal research. With over 60 years of combined operational policing experience, John McKay and Joel Johnston, the Principals of DTI™, have consulted and testified extensively across Canada in labour process hearings, public inquiries, criminal and civil court proceedings, coroner’s inquests and fatality inquiries. The Principals of DTI™ are highly- sought-after "Court-certified" subject-matter experts with unparalleled experience across Canada in the high-risk areas of law enforcement and security. The Principals of DTI™ are not simply use of experts - they have done it at every level. They are practising, lifetime martial artists. They have been operational police officers, in patrol, foot patrol, traffic enforcement, SWAT, Crowd Control, Training, and Supervision.

They have been involved with numerous national and international law enforcement working groups - authoring regional, provincial, national and international policy on law enforcement and security force response options and training. They have written the Course Training Standards and Lesson Plans and have personally trained the use of force instructors as well as line officers in the law enforcement and security professions in British Columbia and elsewhere. They have presented at international conferences and have written extensively in national and international professional journals and magazines on the subject of police use of force, less lethal weapons, arrest & control tactics, self defense, public order, tactical operations and law enforcement accountability. They have analyzed and reported on hundreds of use of force incidents over the past 20 years. The Principals of DTI™ have literally written the book on law enforcement use of force.

All aspects of Use of Force/Force Response for:

• Police
• Other Law Enforcement
• Security
• Sheriffs
• Corrections
• Citizen Self Defense
• Social Services
• Training
• Physical Control Tactics
• Less Lethal Weapon Systems
• Firearms
• Emergency Response (SWAT) Operations
• Crowd Control/Public Order Operations

DTI™ provides:

• Incident Analysis & Consultation
• Force Science® Analysis
• Trial Preparation & Presentation
• Subject-matter Expert Witness Testimony
  
  
• Over four decades of experience in the Courts
• Accepted as Use of Force Subject-Matter Experts in BC, Alberta, Saskatchewan, Manitoba, Quebec, Nova Scotia