Haddad manhunt continues through grief

Perry Duffin

Homicide detectives are continuing to investigate Cecilia Haddad's former lover after a series of memorials for the Brazilian executive found dead in a Sydney river nearly three weeks ago.

Kayakers discovered Ms Haddad's fully-clothed body in the Lane Cove River near Woolwich on the morning of Sunday, April 29, about the same time her former live-in lover Mario Marcelo Santoro flew home to Rio de Janeiro ahead of schedule.

AAP understands he did not attend a memorial for Ms Haddad which had been organised for friends and family in Ipanema.

It was followed by another memorial last Friday in Perth, where Ms Haddad first made a life for herself in Australia as a rising star in the logistics arm of the mining industry.

Her best friends and former husband, who live in Perth, were prevented from speaking to media in Perth.

But many more shared tributes to the intelligent, popular and ambitious 38-year-old online.

"Life goes on for everyone, but emptiness and longing will last forever," one friend posted on Facebook in Portuguese, along with a series of photos of Ms Haddad, on Tuesday.

"You were, and always will be, a little bit of us, you left us very early but will be forever present in our hearts."

Investigators confirmed Ms Haddad had asked Mr Santoro to move out of her Ryde apartment, in Sydney's northwest - and six kilometres from where her body was found - in the weeks before her death.

There was no sign of a break-in at her home.

Mr Santoro, last week, reportedly told News Corp he has placed himself at the disposal of police but would not comment further on the investigation.

Mr Santoro and his relatives have not responded to AAP's emails or messages.

NSW Police told AAP they have not made plans to follow Mr Santoro to Brazil but they previously said they had engaged international partners to locate and contact him in Rio.

As yet police have not named any suspects in the case but note numerous persons of interest.