An elderly widow brutally murdered in her Melbourne home was last seen alive the day she reported a "dispute" to police.
Detectives believe 77-year-old Vicki Ramadan's opponent in that argument also killed her, it has been revealed.
"This was a brutal attack on a vulnerable woman who suffered horrific injuries in the safety of her own home," homicide squad Detective Inspector Tim Day said on Wednesday.
Ms Ramadan was found dead by a neighbour in her Marlborough Way house at Sydenham, on April 6 about 9.45am.
The last confirmed sighting of the elderly woman was on March 23 at Keilor Downs Police Station where she reported the dispute, Det Insp Day told reporters.
However, he would not reveal details of the dispute and instead called on anyone with information to come forward.
A suspect who had been questioned by police is believed to be involved in the dispute with Ms Ramadan, he confirmed.
"We are very confident that we can provide Vicki's family with answers but to do that we are going to need the public's help," he said.
"We believe Vicki would have told others about this dispute and who the dispute was with."
The elderly woman was well known in her community and would chat to people wherever she went, particularly traders and shopkeepers in the Watergardens area.
While the detective would not go into details about the scene or any possible murder weapons, he said police knew how Ms Ramadan died.
Hundreds of people had been interviewed in relation to the crime and detectives are specifically hoping someone would come forward about the dispute.
Ms Ramadan's sons Dennis and Edji spoke of their mother.
"(She was) very independent, very strong lady and ... wouldn't take any shit from anyone," an emotional Dennis said.
"No one should die in the manner that our mother did it was pretty horrendous."
His brother Edji urged the killer or anyone with information to come forward.
"It's been tough, it's hard to come to terms and we want answers."
"Some coward picked on an elderly lady, a frail 77-year-old to do this ... unbelievable, cowardly act"
Police have revisited the crime scene several times in the past five months in the hope of learning more about the circumstances of Ms Ramadan's death.
Tests have also been conducted on items at the property.
In the days after Ms Ramadan's death, squatters living in a nearby house were interviewed by investigators and subsequently ruled out as suspects.