Detectives have appeared to stage a recreation of events, outside the Avondale Heights home of murdered mum Karen Ristevski.

Yesterday afternoon a black Mercedes coupe, identical to the one Ristevski used to drive, was seen on the back of a tow truck and also being driven around the streets near the family home.

Exactly what detectives were doing is unknown as they wouldn't comment on the activity.

Ristevski's husband Borce left the family home this morning, but wouldn't stop for questions.

Her Mercedes was seized from the home last year for forensic testing.

The black Mercedes was towed from outside Ms Ristevski's Avondale Heights home this afternoon. (3AW Melbourne)

Last month police released CCTV of a black Mercedes identical to that of Ristevski's, being driven through Diggers Rest towards Mount Macedon on June 29 last year, the day she disappeared.

The Melbourne mum's body was found dumped in bushland at Mount Macedon in February this year.

Police have previously identified husband Borce as a suspect. He has always denied any wrong doing.