A G.
9/13/2021
While I'm not an expert, I can confirm that polygraphs are not 100% accurate. If you are anxious or your nerves are not right, wait to take the test. John uses a medical device which reads blood...
Grogan Polygraph
Closed
(26)
6211 Van Nuys Blvd
Van Nuys, CA 91401
Certified Polygraph in Van Nuys, CA is a trusted and experienced polygraph testing service with over 37 years of Los Angeles polygraph experience. They offer polygraph tests for various purposes, including relationship issues, law enforcement applicants, theft, abuse, immigration, and more. With their world-renowned examiner and immediate results, they are the gold standard in private polygraph testing, providing accurate and reliable testing at an affordable price.
With over 13,000 completed exams and a reputation as the #1 choice of TV shows nationwide, Certified Polygraph is known for their high accuracy and professionalism. They prioritize client satisfaction and transparency, explaining everything about the test before conducting it. Whether it's for personal matters or to impress someone with the truth, their experienced polygraph examiner ensures the utmost precision. Additionally, they offer polygraph testing in the Los Angeles area and surrounding regions, providing distraction-free testing for individuals seeking reliable results.
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Reviews
2.526 reviewsSip And Chill L.
9/7/2025
Me and my husband came to get a lie detector in April 2023. Arriving there me and my husband went to the restroom. My husband came out the restroom first, he was in the room talking to John when I...
Nathalie M.
12/30/2024
READ! This man is a fraud and all he cares about is money. I was at my low point in life two years ago when my abusive ex bf took me to take a test. I was so nervous and scared since my ex was...
Tina B.
7/28/2025
I lost a year of my life because of this piece of fill in the blank. He did a lie detector test on my husband and he said he passed. After doing my own research for a whole year I found out that I...
Terra M.
1/10/2024
I took my husband in for an infidelity polygraph test and was really taken back by the owners process. It made it almost impossible to get a decent read. He kept implying that he took kick backs...
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