Danny Seiler - Polygraph Examiner
Private Investigator
Hagerstown, MD
4.0/1 Review
Owner
Dan S.
Dan Seiler is a retired Maryland State Trooper and was a supervisor of polygraph testing for over ten years before retiring in 1990. Dan is past president of the Maryland Polygraph Association and has conducted over 5000 polygraph examinations. He is certified to do criminal, civil and treatment types of tests.
Languages
English
Member since May 2026Request removal
Specialties & Services
Civil InvestigationsCriminal DefenseLitigation SupportPolygraph / Lie DetectorSurveillance
Service Areas
Washington County, Maryland
About
Established in 1978. Cops, Inc. was originally a part time business while Dan Seiler was employed with the Maryland State Police. After retiring form MSP in 1991 Cops, Inc. became a thriving detective agency with both Investigation and Polygraph Services. Dan got his start in polygraph during his last 10 years with MSP. He continues today after over 24 years experience as a private polygraph examiner. Cops, Inc. has been in good standing as a Maryland Corporation ever since it was formed.
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Anonymous
Follow up on first review after an hour long conversation we come to the conclus
Follow up on first review after an hour long conversation we come to the conclusion where the problem question is and he is retesting me at no additional cost. It took a lot of arguing but I'm happy with the results