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Letters of Reference & Recommendations

Vecchi Group International, LLC

1010 Surf Pine Drive - Unit G

Surfside Beach, SC 29575

Office: 843.564.7060

Fax: 605.559.0414

Dear Sir or Ma’am:


By way of introduction, my name is Dr. Gregory M. Vecchi, PhD.

I am a retired FBI supervisory special agent, career hostage negotiator, and Chief of the FBI Behavioral Science Unit. I have over 30 years of law enforcement experience. I have also taught defensive tactics, firearms, and use-of-force training to civilians and law enforcement officers for over 20 years.


I have known Lawrence Sloan for nearly four decades. I joined Mr. Sloan’s martial arts school in 1984 and took classes in Filipino martial arts, impact weapons, and defensive tactics. I earned my 2nd Degree Black Belt from Mr. Sloan prior to joining the military. During my career in federal law enforcement, I have personally used what I learned from Mr. Sloan to defend myself during international and undercover operations. I have trained others using Mr. Sloan’s system and I use it as a basis for my Tactical Conflict Resolution de-escalation and use-of-force system that I teach domestically and internationally.

Mr. Sloan was a student and instructor under Grand Master Remy A. Presas (1976-78) and he has taught hundreds of law enforcement, security, and personal defense training seminars, as well as providing personal protection for executives, celebrities, and politicians. Mr. Sloan has trained professionals in a variety of venues to include police in-service trainings, casinos, Indian Reservations, and private corporations.


Mr. Sloan’s training system, Defensive Tactics and Control Techniques (DTACTUSA) is derived from the Filipino Martial Arts and it can be used as a stand-alone defensive tactics system or it can be used to augment existing skill sets. The system emphasizes defensive tactics and control procedures that are simple, functional, and legal. DTACTUSA is especially well-suited for law enforcement and security professionals because it incorporates elements of de-escalation with a high emphasis on liability protection.

As a student and friend of Mr. Sloan’s for nearly 40 years, I can honestly and enthusiastically endorse his training. I recommend his training courses for anyone in need of defensive tactics and control techniques.


For any questions, please feel free to contact me via email ( or telephone (605.920.0229).



Gregory M. Vecchi, Ph.D.

Founder and Principal

Vecchi Group International, LLC


Erin and Mike Zoccoli own the Main Street Brazilian Jiu Jitsu school in Nevada, Iowa


"DTACT is a great stand-alone self-defense program and an even better addition to any martial arts training. While the program is geared towards law enforcement, the effective techniques are based on skill rather than strength. As a result, they can be successfully used by anyone, any age, or any fitness level.

Classes are fun and focus on learning the techniques as well as situations where they would be applicable. The goal is not to hurt your opponent but to effectively and safely control the situation.

Larry has tons of knowledge and skill as well as patience. He does not try to sell a gimmick! The tactics and techniques learn are adaptive and can be used in any situation. They are science-based with a focus on quick de-escalation while ensuring the safety of the officer, subjects, and the public."

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