Back to All Events

UNTHINKABLE: Concepts and Techniques for the Gravest Extreme

  • Hyatt Place 650 Bakers Bridge Avenue Franklin, TN, 37067 United States (map)
Unthinkable: Concepts and Techniques for the Gravest Extreme
from 100.00
Sign Up Here

Unthinkable is, in brief, a tour of the dark side of our society: criminal violence. In one very full day, attendees will undertake a fast-paced and interactive overview of how Violent Criminal Actors think as they decide whom to victimize, focusing on our demeanor and behavior for cues that we appear easily victimized. Hands-on training will introduce robust, effective techniques for managing interactions with unknown contacts, who may or may not intend us harm, including disarming an assailant armed if necessary. The day will finish with an in-depth review of the psychological and social development of VCAs, with particular attention paid to incorporating this knowledge into a powerful, adaptive mindset of self-protection.


Attendee Feedback

“I wish everyone important to me would take this class.”-UNTHINKABLE attendee, 2015

William Aprill is one of the most important thinkers in the defensive shooting world today. His insight into what makes criminal attackers "tick", as well as his understanding of the psychological aspects of training and response, are valuable to everyone who has a firearm for personal defense.

-Grant Cunningham, educator and trainer (

“If I could go back in time I would trade every moment I've ever spent in a carbine course to listen to William Aprill's lectures in the Unthinkable class because THAT information was the kind of stuff I needed.

-UNTHINKABLE attendee, 2014

The gun is certainly a wonderful and very powerful tool, but it’s not wise to pin your survival strategies only upon the possession of that tool. “Unthinkable” arms you with information. Critical, crucial knowledge that may not be needed every day, but if the unthinkable happens it gives you enough exposure to know there is almost always something you can do to improve your situation. The exposure opens your mind...



William Aprill is a career mental health professional with over 20 years’ experience across the continuum of clinical care. He presently maintains a private practice and consultancy specializing in post-traumatic interventions and other disciplines.

William is a former deputy sheriff (Orleans Parish, LA, Criminal Sheriff’s Office) and Special Deputy US Marshal (Eastern District of Louisiana). He is a decorated competitive shooter and has taught civilian, law enforcement, and military personnel in various fighting skills since 1990. He maintains an active schedule both as student and teacher, having been instructor-rated by several top-tier trainers and studying under many of the most influential members of the combative arts community.

Through his company Aprill Risk Consulting, William has presented his material on violent criminals and their decision-making, defensive incident aftermath, mindset development and defensive preparedness nationally, including at the Illinois Homicide Investigators Association, the Annual Conference of the International Association of Law Enforcement Firearms Instructors (IALEFI), the Annual Conference of the Georgia Association of Law Enforcement Firearms Instructors (GALEFI), Rangemaster Tactical Conference, The Field & Tactical Medicine Conference, A Girl & A Gun Annual Conference, Tactical Response Alumni Weekend, and the Louisiana Homicide Investigators Association. He is a co-founder and the Training Director of Paul-E-Palooza, the memorial conference and fundraiser for the family of the late trainer Paul Gomez.

He has conducted collaborative presentations across the country with Craig Douglas/Shivworks, Modern Defensive Training Systems, Immediate Action Combatives, Point-Driven Training, Sharp Defense, Lethal Force Institute, Rangemaster, Active Response Training, Tactical Response, Safety Solutions Academy, Defense Training International, Armed Dynamics, and others.

William has recently contributed to several significant projects in the self-protection industry. He is one of the cadre of expert contributors featured in the highly-acclaimed Outdoor Network series Best Defense, including the episodes “Mass Casualty Event”, “Airport Attack”, and “Cyber Stalking”. He authored a chapter on violent criminals included in Massad Ayoob’s latest anthology Straight Talk On Armed Defense: What the Experts Want You to Know, was one subject of the recently released book Anatomy Of A Warrior, and is the subject of two Personal Defense Network DVDs of his original training material on defensive decision-making and mindset development,“Violent Criminal Actors” and “The 5W’s of Personal Defense”

In the News & Appearances

William Aprill has been referenced in publications including RECOIL magazine, The Tactical Wire and The Journal of the Armed Citizen’s Legal Defense Network, and has been a regular guest in firearms/training industry media, including popular appearances on: Ballistic Radio, Practically Tactical, Downrange Radio with Michael Bane, Civilian Carry Radio, Real Gun Radio, American Warrior with Michael Seeklander, The Safety Solutions Academy Podcast, Armed Dynamics Podcast, Armed Squirrels Project, GunBlog VarietyCast, "Dr. Z" YouTube Channel with Dr. Dave Zehrung, "Crash & Burn" with Allstar Tactical, ReWild Yourself Podcast, Personal Defense Talk