Our Examiners

Steve van AperenSteve van Aperen

Polygraph Examiner MAPA,
BA. (Criminal Justice Admin.)
Grad. Dip. (Security Mgmt)
Director, Australian Polygraph Services

In 1996 Steve was the first Victorian Police Officer to graduate from Western Oregon University USA as a certified polygraph examiner. After graduating Steve trained with and examined polygraph testing formats and behavioural interview techniques utilised by the Los Angeles Police Department (LAPD) Polygraph Unit, US Secret Service, Los Angeles County Sheriff’s Office and the Federal Bureau of Investigation (FBI). Steve is now the Managing Director of Australian Polygraph Services and consults his services to the public, government and corporate organisations worldwide.

Steve was also consulted by the South Australian Police to set up their Pre-employment polygraph screening program which commenced in 2008. Australian Polygraph Services has since conducted a number of pre-screening polygraph tests on selected applicants as part of their recruitment process.

Steve also consults his services to the Victoria Police homicide squad and the South Australian Police Major Crime Squad and has conducted polygraph testing for 76 high profile homicide cases and one serial killer investigation. Steve has also conducted a number of other high profile media polygraph tests and interviews including:

Radio & Television Appearances/Interviews:

3AW (Neil Mitchell), 2UE, ABC, 3LO, 5DN (Deryn Hinch), ABC radio, Today Tonight, A Current Affair (McDonalds competition scandal), Today Extra, Good Morning Australia (Bert Newton), The Footy Show (ARL), National Nine News (Perth serial killer investigation), Fox FM (Tracey & Matt), Southern FM, Sex Lies & Politicians, Hey, Hey its Saturday, Channel Ten News, The Panel, The Crud Show (Triple M), 3AW (Ernie Sigley) Triple J. Mornings with Kerri-Anne and various others.

Feature Articles:

The Herald Sun, Security Australia, The West Australian, The Sydney Morning Herald, The Sunday Herald Sun, The Telegraph, Queensland Courier Mail, The Investigator, Australian Style, The Age, Security Oz Magazine, The Financial Review, GQ Magazine, Who Magazine, Madison.

Cristelle van Heerden

Polygraph Examiner (Certified & accredited by the American Polygraph Association)
Certified & Accredited Polygraph Examiner (17 years experience)
*Latest Polygraph equipment & Software*

1998- Accredited training
1999- Scientific Content Analysis
2003- Advanced & Specialised training in Psychophysiological Detection of Deception
2015- Polygraph testing suspected sex offenders and their victims

Cristelle van Heerden received her training in 1998 from Argenbright International Institute of Polygraph. Her instructor was Mr. Charles Slupski, the previous Director at the US Department of Defence Polygraph Institute. The course was fully certified and accredited by the APA (American Polygraph Association). APA examiners are highly qualified professionals who are motivated to help protect the public by verifying the truth, while following the highest standards of moral, ethical, and professional conduct. APA examiners pledge to follow all the rules and regulations for polygraph methodologies that are accepted and used in the field today.

In 1999, Cristelle received further education in Scientific Content Analyses from the Laboratory for Scientific Interrogation and in 2003 she was awarded certification in Advanced and Specialised Training in Psychophysiological Detection of Deception. In 2015 she successfully completed her training in polygraph testing suspected sex crime offenders and their victims.

Cristelle has been a polygraph examiner for the past 17 years and has conducted hundreds of polygraph tests covering fidelity, child molestation, rape, bribery, theft, veracity and various other issues. Cristelle now conducts polygraph examinations in our new Queensland office.

Testimonials for Cristelle:

I can highly recommend Cristelle at Australian Polygraph Services. She was professional and friendly. She took the time to fully explain the test process and answer my questions. Cristelle did not judge me or my circumstances, she provided an unbiased test in a proficient manner. I was given an immediate verbal outcome and CD copy of the recording and later that day I was emailed the full detailed report.

I felt at ease during the whole process and overall I was extremely happy with her services.


I would like to recommend Australian Polygraph Services to anyone considering having a polygraph test. I base this recommendation on the professional manner of conducting the polygraph test with a qualified and very experienced tester named Cristelle. I had a polygraph test done some months prior with another polygraph company which was conducted in the privacy of a home visit, there were several questions asked which I believe possibly flawed the test and left room for error and misinterpretation and did not entirely focus on the main question and the issue at hand whereas Australian Polygraph Services focused on a precise accurate direct statement pertaining to the main question and issue at hand to leave no room for error or misinterpretation. The testing procedure was explained in detail. A discussion with both parties took place to determine the matter and issue at hand to ascertain the main question to bring about and get the best and most accurate result possible regarding the polygraph test. A pre test interview and assessment was also conducted. The outcome of the test was transparent, there was no discussion of the results until both parties were present. A video and audio tape of test was given on the day, the results were sent to both parties by email within 24 hours. I would highly recommend Australian Polygraph Services to anyone seeking a professional service with value for money that cost a considerable amount less than the other company.