Tom Bevel is the President and creator of Bevel, Gardner and Associates Inc., a forensic education and consulting company. He was an associate professor in the Masters of Forensic Science program at the University of Central Oklahoma, Edmond, Oklahoma. He retired after 27 years with the Oklahoma City Police Department. His last assignment was the Commander of the Homicide, Robbery, Missing Persons, and the Major Unsolved Case units.

Ross M. Gardner is Vice President of Bevel, Gardner and Associates. He worked for the U.S. Army Criminal Investigation Command (USACIDC) as a felony criminal investigator for nearly 20 years. He retired as a Command Sergeant Major and Special Agent in 1999 after serving a total of 24 years in the U.S. Army law enforcement. Mr. Gardner subsequently served four years as the Chief of Police for Lake City, Georgia, a small suburban Atlanta police department. He is now retired and active in independent consulting.

Tom J. "Grif" Griffin is the owner of Griffin Forensic Solutions & Consulting, LLC, and a partner in Bevel, Gardner & Associates. Mr. Griffin holds a bachelor's degree in chemistry from The Colorado College and did graduate work in chemistry at the University of Northern Colorado where he designed and instructed a course in forensic chemistry. He worked as a criminalist and CSI at the Greeley, Colorado Police Department for four years before going to the Denver office of the Colorado Bureau of Investigation as a forensic chemist, crime scene investigator, and bloodstain pattern analyst. He retired from CBI after 27 years to become a private consultant and instructor.