Dennis R. Jahnke

Dennis R. Jahnke


Lieutenant Dennis Jahnke joined the Hennepin County Sheriff’s Office in 2001 after earning a bachelor’s degree in law enforcement from Minnesota State University, Mankato. He currently helps oversee the Criminal Intelligence Division, including personnel assigned to the FBI’s Joint Terrorism Task Force and guiding the department’s Shield program that links the intelligence analytics of law enforcement with the eyes and skills found in the private sector. He is also the Manager of the North Central High Intensity Drug Trafficking Areas Minnesota Investigative Support Center and leads the HCSO Threat Assessment Team.

In his tenure, Lt. Jahnke’s gained valuable practical insight into management challenges and problem solving through his work in county court security, at the adult detention center, and investigating personnel background with the human resources division. He applied this expertise and street sense in his role as team leader for the Emergency Services Unit (ESU), the county’s special weapons and tactics response team for 17 years. He also spent 10 years leading the ESU Sniper Team. He was on the adjunct faculty for Texas State University and currently with Louisiana State University teaching criminal intelligence, emergency preparedness and tactical response training to officers/analysts facing criminal or terrorist attacks. He also is a certified Master Trainer with the DHS National Threat Evaluation and Reporting Office.

Because of his expertise, Lt. Jahnke was twice chosen for a fellowship position within the FBI, bringing his practical knowledge to the Bureau’s Active Shooter Initiative at FBI Headquarters in Washington, DC.  The fellowship is sponsored by the Office of Partner Engagement in conjunction with the FBI’s Police Executive Fellowship Program.

Lieutenant Jahnke routinely is invited to teach and speak at conferences at private sector events throughout the United States on topics including the active shooter phenomenon, terrorism, countering violent extremism, and sovereign citizens. Conferences attendees come from a variety of professions including law enforcement, military, emergency management services, fire, probation, private sector security, mental health, and threat assessment professionals.

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