Original reports were that the man was Reddy's current partner, after Sunrise made the following statement.
"I'll see you again one day ... and we'll continue where we left off my angel", Mr Vemula wrote.
"Super anxious", he wrote on March 4.
She had last spoken to her family on Sunday morning after staying the night in the Sydney CBD with her ex-boyfriend after the convention.
After her family filed a missing person case at the police station, investigators launched a search for her auto which they found parked near Strachan Street, Kingsford, about 9.30 pm on Tuesday. She had been stabbed "numerous times", officers said.
The gruesome discovery came just hours after police issued a public appeal to find the 32-year-old from Penrith.
"At that time it was still a missing person's inquiry", Detective Superintendent Dengate said.
Later that night he smashed his BMW headlong into a fully-laden semi-trailer on the New England Highway.
Dr Preethi Reddy was found stabbed to death.
Young Indian-origin dentist, boyfriend found dead in Sydney
The NSW police said they were appealing for information in relation to her whereabouts.
Her last image was recorded at a McDonald's outlet on George Street in Sydney's Central Business District around 2.15 a.m. on Sunday.
Inside the restaurant, footage shows Dr Reddy standing alone at the counter.
This morning her colleagues posted on Facebook about her death. The last she spoke to her family was at 11 a.m. on Sunday when sje told them that she would return home after breakfast.
She was reported missing to Nepean Police Area Command later that night after she failed to arrive home. "I spoke to her last Thursday and it was "see you next week" and completely normal", she said adding "Now I am just praying she will be found", Holmes said. The suitcase was found in her vehicle that was located in Kingsford area of Sydney.
Investigators believe that Narde did not accept that, and had attended the weekend conference purely in order to see her. "There's many a facet and areas that we'll investigate". "It takes a lot of effort to be a dentist and she achieved it. the family's so proud that they had a daughter like that", Anand told reporters.
It is understood Dr Reddy worked at Glenbrook Dental Surgery in the lower Blue Mountains.
ABC identified Preethi's ex-boyfriend as Harsh Narde.
"The last time I saw her was at a conference in Sydney in March past year and she was there with (Narde)", Mr Vagadia said.
Understanding the Scandal That's Tarnished Justin Trudeau's Glowing Image
New Brunswick Liberal MP Wayne Long reiterated his call for a "full and transparent investigation" into the SNC-Lavalin affair. Her clear, principled, damning resignation from cabinet stopped more Trudeau meddling with Canada's legal system.