Annastaes (Anna) Banitskas (above) was just 15 years old when she was last seen at Lalor on August 27, 1974.
The young girl left home to catch a bus at nearby Kingsway Drive to go to work. She never arrived.
Now 40 years on, police have again appealed for public help to find of what happened to Anna.
“It’s the not knowing that’s the worst.” Anna’s sister, Loretta Pantou, said.
“There are so many options for what could have happened. Did she meet with foul play? Did she choose to leave? Questions like that keep you up at night.
“Our family has no closure.”
Detective Senior Constable Craig Hall said police were hopeful someone would come forward with information relating to Anna’s case.
“Any piece of information, big or small, could help us bring closure to Anna’s family.”
When she was last seen, Anna was wearing grey pants, a white jumper and brown shoes.
“We encourage anyone who may have something to say to contact Crime Stoppers on 1800 333 000,” Detective Senior Constable Hall said .
People can also submit a confidential crime report at www.crimestoppersvic.com.au