Karen Ristevski's mother-in-law has spoken out about her mysterious death, saying her son did not kill his wife.

Borce Ristevski's mother told News Ltd on Saturday he was a "good family man" who was nice to his wife and they shared a good family life together.

Karen Ristevski's body was found near where her phone last pinged at Gisborne, Victoria. Photo / Supplied
Karen Ristevski's body was found near where her phone last pinged at Gisborne, Victoria. Photo / Supplied

"He is not the sort of person who could do something like that," she told the

Herald Sun

.

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The Melbourne mother's remains were found in a reserve near Mount Macedon on Monday, almost eight months after the 47-year-old went missing from her Avondale Heights home.

Borce Ristevski used to run Blue Laser Jean Co with his brother Vasko. Photo / Supplied
Borce Ristevski used to run Blue Laser Jean Co with his brother Vasko. Photo / Supplied

A lawyer for her husband Borce Ristevski has said his client is the number one suspect but maintains his innocence.

The site where the body was found this week. Photo / Supplied
The site where the body was found this week. Photo / Supplied

-AAP