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POLYGRAPH EXAMINATION REPORT | PRIVATE AND CONFIDENTIAL
Date: 03/03/2026
Client name: Blokker family
Address: 19 San Marina, Seaward Estate, Ballito
Invoice: Paid in full
Email: Chris Jenson
Subject: Specific Issue — Murder on 9 April 2025
Test Type: Specific issue test (MGQT)
We were commissioned to conduct a specific issue test for the Blokker family.
The MGQT was applied, and a minimum of three examinations were administered on the examinee, in accordance with our standards of practice. During the examination, attention was given to the verbal, as well as non-verbal behavior of the examinees.
Interviews were conducted with the subjects to establish whether they were fit and suitable for polygraph testing. An inquiry into the subject’s medical and current well-being was made. The subjects were deemed to be suitable for polygraph testing. The candidate’s conditions, medications and current general health are detailed in the report with careful consideration to their privacy and dignity.
Before the process was started the candidate read and signed my consent form. The science of polygraph and the function of the different components was explained until understood. The candidate was made aware that the instruments would be attached to their bodies with minimal discomfort and strict adherence to Covid19 compliant practices.
EXAMINER
Sean Wernich was a member of the SAPS from 1990 to 2004. He had a distinguished career, 8 of those years as a senior detective. From 2004 he became involved with private security and investigations using polygraph. He successfully completed the academic and practical requirements of the Professional Examiner Training Program for Psychophysiological Detection of Deception hosted by Quality Polygraphs in Pretoria. Since 2017 he has been qualified as a professional polygraph examiner, which is accredited by the American Polygraph Association; he is also a member of the South African Professional Polygraph Association and American Polygraph Association. He has completed his necessary advanced training, and his equipment has been tested in the last 6 months.
The Lafayette LX 4000B digital polygraph system (serial number 172960FE) in conjunction with a MGQT Technique was utilized by the examiner. The Empirical scoring technique was used to affect the examination. 3 tests were conducted on each of the subjects for the purpose of collecting data for scoring.
Question formulation was reviewed with the subjects at length. The subjects clearly understood the questions that we intended to put to them.
NAME OF THE EXAMINEE: Johan Blokker
ID NUMBER: 900215 5109 082
DATE OF EXAMINATION: 2 March 2026
CELL PHONE: 064 1605 377
The Blokker family requested me to do a specific issue test on one of their family members who has been arrested for the murder of Luke Edwards. This accused, Johan Blokker, runs a rehabilitation centre for addicts in the Westbrook area of KZN. One of the patients admitted to this Tetelestai Recovery Centre named Luke Edwards, was found murdered on 9 April 2025. There are allegations that Mr. Edwards tried to escape the facility and assaulted several staff members during the attempt. His body was found in the property next door to the facility.
Some of these staff members were previously arrested and charged for his murder. Mr. Blokker was arrested last week, allegedly with little or no evidence. The matter appears before court again this Thursday the 5th of March. The Blokker family are desperate to get some clarity on whether their son has anything to hide regarding this murder. Their son maintains his innocence, and they are not aware of any evidence to implicate him. I was asked to provide this clarity.
EXAMINEE DECLARES THE FOLLOWING INFORMATION:
Time working for Tetelestai: 6 months
Position: Manager
Polygraphed before: One time
Chronic medication: No
Highest standard of education: Grade 12
Married: Yes
Children: One
Driver’s license: Code 08
Suitability for polygraph: Yes
Arrested before: 10 years ago, for theft
Criminal record: No
Ever dismissed from employment: Never
Illegal drugs use: Addict. Int
INTERVIEW
The examinee has been staying at the facility for 6 months where he works as a manager, although he admits that he becomes a patient when he relapses.
He knows Luke Edwards who had been staying at the facility for a week. During that week he had been called to assist several times as Luke had been assaulting the staff.
He says he never assaulted Luke, only doing what was necessary to subdue him.
On the night of April 9th, he says he was not even present when the drama occurred. He was at home with his family from about 18:00. At no stage did he leave until the next morning.
The following day he learnt that Luke was dead on the neighbouring property.
He did confirm looking at the body and noticing that Luke had been severely assaulted.
He does not know who murdered Luke but suspects it may be the security guards where Luke’s body was found.
He denies that he knows for sure who murdered Luke.
He denies that he was present when Luke was murdered.
He denies that he murdered Luke.
He denies that he had a plan to murder Luke.
THE FOLLOWING 4 RELEVANT QUESTIONS WERE ASKED OF THE EXAMINEE DURING THE TEST
Scoring key: NSR = No Significant Reaction (No Deception Indicated) | SR = Significant Reaction | INC = Inconclusive
Question 1: DO YOU KNOW FOR SURE WHO MURDERED LUKE EDWARDS?
Answer: NO
Response: NSR — No Significant Reaction / No Deception Indicated
Question 2: WERE YOU PRESENT WHEN LUKE EDWARDS WAS MURDERED?
Answer: NO
Response: NSR — No Significant Reaction / No Deception Indicated
Question 3: DID YOU MURDER LUKE EDWARDS?
Answer: NO
Response: NSR — No Significant Reaction / No Deception Indicated
Question 4: DID YOU HAVE A PLAN TO MURDER LUKE EDWARDS?
Answer: NO
Response: NSR — No Significant Reaction / No Deception Indicated
DATA INTERPRETATION / OPINION CONCERNING TRUTHFULNESS:
Global analysis of the physiological data revealed that there is sufficient interpretable quality to complete a standardized numerical analysis of the test results. Analysis was performed using the Empirical Scoring System (ESSM).
It is the expert opinion of the forensic psycho physiologist that Johan Blokker was TRUTHFUL when he answered the Relevant questions asked, because, in accordance with the multinomial theorem, only a very small percentage of untruthful persons would produce the same score.
RESULT: Johan Blokker PASSED the polygraph examination. No Deception Indicated (NDI) on all four relevant questions.
Sean Wernich
Forensic Psychophysiology
[email protected]
(Submitted Electronically)
CONTACT NUMBER | 083 7817 784 | EMAIL ADDRESS |
[email protected]
POSTAL ADDRESS | Postnet Suite 156, Private Bag X02, Glen Ashley, 4022
WEBSITE | WWW.WERNICHPOLYGRAPH.CO.ZA