In the 1930's, John E. Reid began his career as a polygraph examiner. During his career, Reid was determined to find the best questioning techniques to go along with the polygraph technique. During his observations, Reid noticed the different aspects and behaviors of truthful suspects and deceptive suspects. After many years of precise documentation, Reid developed "behavior strategies" that help detect truth and deception. Reid also designed a list of specific interview questions he called, "behavior provoking questions." Although Reid's interview techniques help during polygraphs, the polygraph technique did not always lead to a confession. For this reason, Fred Inabu and John E. Reid worked together to design a different interrogation method. The new approach consisted of the interrogator to express understanding and sympathy instead of frightening the suspect to obtain a confession. Inabu and Reid developed the nine step formula of psychological manipulation. Today this technique is known as the REID technique and is used across the U.S, Canada, Europe, and Asia.