Mr Tamvakis was arrested at a Bentleigh cafe at 4pm on Wednesday after a member of the public recognised him and called police. A closed out-of-sessions court hearing will be held this evening, where the accused will likely be remanded in custody.
Earlier this week, Detective Senior Sergeant Stephen McIntyre said Mrs Tamvakis had “obvious injuries” and appeared to be the victim of a violent assault.
While there are reports that a knife had been used in the attack, police will wait for results of a post-mortem examination before confirming the use of any weapons.
Concerns were first raised when Mrs Tamvakis didn’t pick up her grandchildren from school in the afternoon.
It is understood the children’s school rang Mrs Tamvakis’ eldest daughter, who collected her children and then rushed to her mother’s home, to find her fatally injured.
“The family are obviously distressed, it was quite a traumatic experience,” Detective Senior Sergeant McIntyre said on Wednesday.
Mrs Tamvakis was remembered as a “very kind” grandmother who delivered homemade Greek sweets to her neighbours.
A neighbour said Mrs Tamvakis had been widowed many years ago, but was extremely close to her daughters and grandchildren, and was a well-known member of the neighbourhood.
Jim Kasidiaris said his mother Anastasia, who also lives in London Street, had been best friends with Mrs Tamvakis for years.
The two women, both widows, saw each other every day.
“They watched Greek movies together on satellite,” he said.
“Violet would visit my mother every day. She would walk past in the morning and again in the afternoon.
“She was a lovely, lovely lady.”
Police are investigating claims by neighbours that they regularly heard shouting at the property. When her son was unable to be contacted by police following the death, they appealed for him to come forward on Wednesday afternoon before he was arrested.