More than a decade ago, Joanne Howell was brutally assaulted and strangled in her home in what Victoria Police believe is a solvable crime.
Investigators have been told plenty of stories over the years and now they've launched a fresh appeal for information about her 2007 murder in the hope that whoever knows the real story comes forward.
The 51-year-old was found severely injured in her Poath Road apartment in Hughesdale, in Melbourne's southeast, about 11.20pm on April 17.
She had been assaulted and strangled and died at the scene, despite the efforts of police and paramedics to save her life.
Investigators initially believed the crime occurred some time over a more than two-hour period but have now narrowed that down, casting significant doubt on previous versions of events given to investigators.
"We have a 15-minute window either side of 9.15pm in which a supposed random intruder has broken into the house and assaulted and strangled Joanne," Detective Inspector Tim Day said on Tuesday.
"I'll leave that up to others to decide whether or not that's likely."
As part of the fresh inquiry, they've released a digital image of a person seen acting suspiciously around Ms Howell's home about the time of her death and asked anyone who can identify that person to come forward.
An inquest in 2011 found Ms Howell's former partner Paul Charlton was likely involved in her death.
Ms Howell had given him a month to leave their home earlier that day and asked him to move out of their bedroom immediately.
Mr Charlton was the last known person to see Ms Howell alive, and said he was out walking their dog for two hours before returning to find her injured.
He was arrested at the time and remains a person of interest, but has never been charged.
Coroner Paresa Spanos said she didn't rule out coincidence, but it was "highly improbable" that an unknown person inflicted Ms Howell's fatal injuries.
Det Insp Day said new information had come to light over the past year.
"Very rarely do people keep their darkest secrets to themselves," he said.
"Rarely do deceitful people tell the same story twice, not accurately at least."
They want anyone who might have been part of a conversation, or have overheard a conversation, about what happened to Ms Howell to come forward.
The homicide investigator said 13 years was a long time for Ms Howell's family to wait for justice.