Karen Ristevski's only sibling has broken his silence over his sister's disappearance.

On April 18 2019, Borce Ristevski was sentenced to nine years in prison for the death of Karen Ristevski.

Two months after his sister’s disappearance, Karen Ristevski‘s brother has addressed the public.

Writing on the Where is Karen Ristevski? Facebook page earlier this week, Stephen Williams said he and his sister’s husband Borce Ristevski have shared a long and meaningful relationship throughout the years.

“I worked with him [Borce] for ten plus years,” Stephen began.

“We’ve had heated disagreements like all family members do but consider us to be close… For those also wondering, I catch up with him weekly for the last two months.”

Karen with brother Stephen Williams. Source: Facebook.

Karen has not been seen since she went for a walk on June 29 to clear her head after an argument with Borce. Her mobile phone was later traced to an area 40 kilometres away from her home just hours after she disappeared.

Explaining why he had not spoken out since Karen's disappearance, Stephen continued, "I have belief in our legal system and will leave it up to them on thoughts etc [sic], me or anyone else speculating won't bring us closer to finding Karen."

Karen with her daughter, Sarah. Source: Facebook. 

Several theories about the mother-of-one's whereabout have been floated since she first disappeared.

But despite intense speculation, police say they are still no closer to finding Karen.

Police are urging anyone who sees or may know anything about Karen's disappearance to call triple zero (000) and anyone with information to contact Crime Stoppers on 1800 333 000 or submit a confidential crime report to www.crimestoppersvic.com.au