Aachen Polygraph Associates are senior professional polygraph examiners with over 29 years of polygraph testing experience. Chief Examiner Dan Seiler retired from the Maryland State Police in 1991 with over 10 years of full time polygraph experience with that police agency. Dan is the past president and Life member of the Maryland Polygraph Association. Dan is a qualified polygraph expert in both State and Federal Courts for both defense and prosecution. Our examiners conduct all types of polygraph testing including but not limited to criminal/civil case issues, certified clinical sex offender testing and domestic partner fidelity testing.

Aachen Polygraph Associates are certified by the American Polygraph Association as post conviction sex offender examiners and have conducted clinical tests on sex offenders with the Catoctin Counseling Center for the last eight years. You may contact Larry Stouter, Director of the Catoctin Counseling Center at (301) 745-6687 ex. 207 to find out how well clinical polygraph testing has assisted in the treatment of his sex offender clients.