Victoria's police chief says he will take steps to "turn around" the focus on the behaviour of victims of crime after the head of the homicide squad was accused of "victim-blaming" in the wake of Masa Vukotic's murder.

It comes as family and friends prepare to farewell the 17-year-old Doncaster schoolgirl in a public funeral on Thursday. Masa was attacked a week ago while she was on an early evening walk near her home.

Victoria's acting Chief Commissioner Tim Cartwright (left), with premier Daniel Andrews. Credit:Greg Briggs

"We must focus on holding perpetrators to account and support victims in all we do," wrote Acting Chief Commissioner Tim Cartwright in an opinion piece for The Age.

"But too often the first questions asked are about the behaviour of the victim. Victoria Police has acknowledged this as an organisation and we are taking steps to ensure everything we do is focused on turning this around."