The 49-year-old walked out of her home in Melbourne's north-west at around 10am after an argument with her husband over money.
The last thing Karen reportedly told her husband, Borse Ristevski, was "I’m going to go and clear my head."
Now, an FBI-trained criminal profiler has given some insight into the unsolved murder, saying that though she wasn't involved in the case, by using the information available to the public and her experience in the field, she has come to the conclusion that either two people were involved in the disposal of Karen's body, or "one very strong person".
Speaking to news.com.au, Kris Illingsworth said, "While the murder may have been a spontaneous or pre-planned event, the body disposal site involved deliberate choices made by the offender."
"Research has shown that when a body is transported to and deposited in a bushland setting, the furthest distance from the parked vehicle is about 30 metres through bushland if easy going, or less than 20 metres if difficult terrain," she continued. According to reports, Karen's body was found 50 metres away from the nearest parking opportunity.
"The location of the two logs between which the body was found is also significant. If these logs are not visible from the parking location then it is highly suggestive of the offender having previous knowledge of that concealment site," Illingsworth noted.
Police are yet to reveal the results of the post-mortem examination on the body, including the cause of death.
This article first published in Marie Claire.