Investigators found Dr Reddy dead in the bag in her own auto on Strachan Lane in Kingsford east of the city about 9.30pm on Tuesday.
She had been stabbed "numerous times".
Her boyfriend was also mysteriously killed in a head-on collision with a truck on the New England Highway, south of Tamworth on Monday night.
She worked as a general dentist at Glenbrook Dental Surgery in the lower Blue Mountains, and was previously employed at Hurstville Dental And Physio Centre in western Sydney, and Dapto Smile Dental Centre, near Wollongong.
The ABC understands the man who died was the key suspect in Dr Reddy's murder.
Sydney: On March 3, a 32-year-old Indian-origin woman Preethi Reddy who went missing in Sydney, Australia has been found dead.
Police on Wednesday confirmed that they had spoken to Narde while investigating Reddy's death before he died on Monday.
Police were told she last made contact with her family at about 11am on Sunday, saying she planned to head home after having a late breakfast in Sydney.
Police officers searched the auto after it was found at Strachan Lane.
The ghastly murder is believed to have taken place on Sunday considering the details of her last contact with the family members.
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Authorities responded with an Oregon Water Resource SnowCat, a construction vehicle, and were able to dig out Taylor and his dog. Unable to continue on, the man and his dog slept in the auto but awoke to find further snow had fallen the following day.
Preethi Reddy was last seen waiting in line at McDonald's in George Street on Sunday.
Preethi Reddy was apprehensive about attending the same conference as her ex-boyfriend on Saturday.
NSW Police described Reddy's disappearance as "out of character" and said there were serious concerns of her welfare. The suitcase was located in her vehicle which is parked in a street in the eastern Sydneyreported New South Wales police.
The New South Wales police said investigation was in progress and details should be verified before they were shared.
"On behalf of my family, I want to thank anyone who shared our appeals to find her, and those who provided information to the police and us over the last few days".
That personality becomes absolutely essential in a movie that doesn't really know how to tell Captain Marvel's origin story. Larson and Jackson have great buddy chemistry on screen, and Carol and Fury's friendship is entertaining to watch develop.
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And all acknowledge there is no chance that Trump will stop commenting and criticizing the investigations. Yet, he did not rule out the possibility that the Trump daughter could eventually be part of the probe.
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By contrast, they argued, President Donald Trump and the Republicans represented racism and bigotry , " pale, male and stale ". This won't be the first time this year that the House will vote on issuing a rebuke on the subject.
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