Paladin Polygraph
* Criminal

* Civil

* Domestic

* Pre-Employment

* Military

* Employee Theft

About Us

Principal Polygraph Examiner:

John Tefft attended Backster School of Lie Detection in San Diego, California, one of the country's most prestigious polygraph schools.

John Tefft is a retired San Diego Police Department Detective.  During his 33 years with the Department he was assigned to the following divisions: Crimes Against Property, Vice investigations, Special Investigations Unit and Auto Theft.  During the last fourteen years of his career he was assigned to the Homicide Unit and has investigated over 500 homicides, death investigations and police-officer-involved shootings.  He was cross sworn as a Federal United States Marshal, which enabled him to investigate multi-state and international thefts. 

Mr. Tefft was an instructor at the San Diego Regional Law Enforcement Academy where he taught Interview and Interrogation to new law enforcement officers.  He also was on the staff at Grossmont College, where he was an instructor for the Correctional Academy.  His subjects were General Law, Codes and Statutes, Courtroom Testimony, and Interview and Interrogation.  

Mr. Tefft has testified as an Expert Witness in civil procedures in the areas of Interrogation, Homicide Investigation, and Best Police Practices.

He is a member and the Past President of California Association of Polygraph Examiners (CAPE).  He is also a member of the American Polygraph Association (APA), and the American Association of Police Polygraph Examiners (AAPP).


Over the course of Mr. Tefft’s career he has received numerous Commanding Officer commendations and letters of commendation from the San Diego District Attorney’s Office. In 1997 he was selected by the California Homicide Investigators Association as Detective Of The Year and in 2008 he was selected as Detective Of The Year by the San Diego Deputy District Attorney’s Association. 

Several of Mr. Tefft’s investigations have been profiled on such television programs as The Investigators, Solved, Murder by the Book and Crime and Punishment.


Mr. Tefft has been a guest speaker for several groups, including the California Narcotics Officers Association, the San Diego Fire/Paramedic Department, the United States Border Patrol and the United States Marine Corps.