Siriyakorn 'Bung' Siriboon should be planning her 18th birthday and looking forward to life after high school but the Melbourne teenager is still missing - five years after her baffling disappearance.
A neighbour saw the then 13-year-old dressed in her school uniform walking to school from her home in Melbourne's outer east around 8.30am on June 2, 2011.
She never made it to school and it was the last time anyone saw Bung.
Police have chased down a mountain of leads, doorknocked 100 homes, interviewed an extensive list of registered sex offenders and offered a $1 million reward - but still, so many questions remain.
Instead of preparing the young girl for her entry into adulthood, Bung's family have instead been mourning a daughter lost.
Her mum Vanidda has moved back to Thailand, unable to cope with the constant reminders while living in Melbourne.
Speaking from their Boronia home, Bung's stepfather Fred Pattison says the lead-up to the anniversary of Bung's disappearance is particularly tough.
He called on those responsible or knew anything about what happened to Bung to come forward.
"People just don't disappear. Someone knows where she is or what's going on - it's time for somebody to stand up and say something," an emotional Mr Pattison told AAP on Tuesday.
With his wife and eldest daughter in Thailand, Mr Pattison says he has few plans on Thursday but will take part in a press conference and visit Bung's former school - she would have been completing her VCE this year.
Police have previously said they are waiting for the one tip-off that could help them find Bung.
Two years ago Homicide Squad detective inspector John Potter identified a man aged in his late 50s or early 60s, with a tattooed arm and a "rock and roll styled hairdo" who was seen driving on Boronia Road with a teenage Asian girl in the back seat on the day Bung went missing.
But after speaking to a number of people of interest, Det Insp Potter said none of them owned a white station wagon.
In 2013 a man claimed he hit Bung with his car and dumped her body at a local reserve.
No remains were found and despite arresting and questioning him twice, police said parts of that man's story didn't add up.
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