David Diller has served over 19 years with the Illinois State Police and has spent 25 years in law enforcement and weapons training.  His many certifications include the following:

NRA Certified Law Enforcement Firearms Instructor for Handgun & Shotgun, I.S.R.A. Range, Bonfield, Il, May 2013 

NRA Certified Law Enforcement Firearms Instructor - Tactical Shooting & Patrol Rifle 

Instructor Development Course, 40-hour, National Rifle Association of America, Las Vegas Metro PD, Las Vegas, NV, October 2011 & November 2005 

NRA Certified Rifle Instructor, Basic Rifle Shooting Course, NRA/ISRA, Bonfield, IL May 2005 

Illinois State Police Patrol Rifle Instructor Course, 32-hour, ISP Academy, July 2004 

IDOC Chemical Munitions Instructor; Illinois State Police Range Officer Instructor School, 36-hour, ISP Academy, June 2004 

Armalite AR-15 Armorer’s School 

Glock Armorer’s School 

Remington Armorer’s School 

Sig Sauer Pistol Armorer's School 

S&W MP Armorer's School 

Illinois State Police Level I Instructor Development School, 32-hour, ISP Academy 

Control and Arrest Tactics Instructor Certification Course, 72-hour, ISP Academy 

Critical Incident Response at Schools Instructor, MTU 8, Feb. 2007;