Active Officers Helping Active Officers Find the Maximum Tactical Advantage Using
Evidence-Based Interviewing and Interrogation
The CTK Group specializes in criminal interview and interrogation training for law enforcement, fire investigators, and correctional personnel. Always have, always will. We do not provide training for loss prevention, the insurance industry, or defense attorneys. This training focuses on legally sound, research-based techniques for eliciting information from criminal defendants. We collaborate with progressive law enforcement agencies who are interested in changing the stagnant culture of interview and interrogation.
The map below highlights past training locations of The CTK Group.
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Our Instructors
The CTK Group has trained thousands of police officers. We are active investigators utilizing an evolving, court defensible game plan that you can use too!
Chris Callaway
Chris Callaway is a Special Agent in Charge with the Division of Intelligence. He served in the Major Crimes Unit of the Iowa Division of Criminal Investigation for 18 years investigating homicides, sexual assaults, cold cases, armed robberies, and
other violent crimes. A graduate of the University of Iowa and also a twelve-year veteran of the Iowa State Patrol, Chris has blended his criminal investigation and drug interdiction experiences into the Cognitive Interviewing component of The CTK Group’s Fundamental and Advanced Courses. He provides patrol officers and investigators with a legally-sound, research-based game plan for interviewing victims, witnesses, and suspects.
Jon Turbett
After graduating from the University of Iowa College of Law, Jon Turbett began his law enforcement career as a Special Agent with the Iowa Division of Criminal Investigation assigned to the Gaming Unit. After five years, he was reassigned to the Major Crimes Unit, where he has worked since 2005. Jon currently investigates a significant number of felony level offenses, including homicides, human trafficking, fraud, and sex crimes. He has presented at the International Law Enforcement Educators and Trainers Association Conference, the Midwest Gang Investigators Conference, and the Conference on Crimes against Women. Jon oversees the legal component of The CTK Group’s Interview and Interrogation courses.
Mike Krapfl
Mike Krapfl is a Special Agent in Charge in the Major Crimes Unit with the Iowa Division of Criminal Investigation, where he oversees agents working homicides, robberies, officer-involved shootings, and other felony offenses. Mike served as an agent in the Major Crimes Unit for 14 years and previously worked as a patrol officer and investigator for eight years with a municipal police department. Mike holds a Master’s Degree in public policy and a BA in criminology from the University of Northern Iowa and instructed for 12 years as a member of the criminal justice faculty at the University of Dubuque. Mike is a member of the International Law Enforcement Educators and Trainers Association and presents at state and national law enforcement conferences.
Scott Reger
Scott Reger graduated from Iowa State University in 1997 and began his law enforcement career as a Gaming Enforcement Officer with the Iowa Division of Criminal Investigation. After eight years, he was promoted to Special Agent within the Gaming Unit before being reassigned to the Major Crimes Unit, where he has worked since 2010. Scott currently investigates a significant number of felony level offenses, including homicides, bank robberies, officer involved shootings, fraud, and sex crimes. Scott is a disciple of the CTK Group’s research-based interview and interrogation methods, applying them in the casework that he handles, and now assists as an instructor with The CTK Group.