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Who Are We Why We Do It Why We Do It TALEPI is a membership organization of Texas Polygraph Investigators that are committed to the highest standards of polygraph testing. Why We Do It Why We Do It Why We Do It Our goal is it to provide support to our members as they use their professional training during interviews. How We Do It Why We Do It How We Do It We partner with the DPS Polygraph school and polygraph investigators across the state to provide quality training. Stay in Touch Sign up to receive more information about our organization.