The sister of murdered Sydney woman Preethi Reddy has praised her "beautiful big sister" as a "bright light" as the family mourns her "unthinkable" death.
The sister of murdered Sydney dentist Preethi Reddy has released a statement saying their family "will never be the same" without her in their lives.
In her first public comments since her sister's violent death, Nithya Reddy paid tribute to her "beautiful big sister."
"Preethi was a bright light; loveable, kind, and protective of all whom were lucky enough to have been loved and cared for by her," she said in a statement.
"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."
The body of Preethi Reddy, 32, was discovered stuffed in a suitcase with multiple stab wounds after police found her vehicle on Strachan St, Kingsford at about 9.30pm on Tuesday.
A key suspect in the murder of the Sydney woman has been identified as her ex-boyfriend Harsh Narde, who was killed in a fiery car crash on Monday night.
Detectives are still working to piece together exactly what happened to the much-loved Penrith doctor - what is known is that Narde, a Tamworth dentist, drove 400km to attend a dental conference at St Leonards in Sydney's north where he met up with Dr Reddy over the weekend.
Dr Reddy told Narde she had "moved on" and intended to "start a new life" with her new boyfriend, according to a police source.
Her previous rejections had failed to deter the "obsessed" Narde, police believe.
In the early hours of Sunday morning, it's thought Dr Reddy visited Narde's Swissotel room in the CBD.
Investigators believe Dr Reddy visited Narde's hotel to make it clear the relationship was over and he then stabbed her multiple times.
Narde did not have a violent criminal history or a record of domestic or family violence, a police source said.
But it's thought he stuffed her body into a suitcase, loaded her into her car and dumped the VW Golf in Kingsford near the University of NSW.
Nithya Reddy said her sister's movements over the weekend before this were still unknown.
"We will stay in touch with detectives as they work it all out," she said in the statement.
She asked for their privacy, particularly her parents and Preethi's partner to be respected.
"[They] are going through the hardest thing that anyone can endure, and please respect that we need our privacy right now."
"We ask that everyone keep that in mind that we are grieving and we need space to do that," the statement reads.
"Our family will never be the same without Preethi in our lives. Please let her beautiful soul rest in peace."
A NSW police spokesman confirmed on Wednesday that police had spoken to the Tamworth dentist, who was first identified by ABC News, as part of the missing person investigation before he was killed.
"As a parent, the worst thing we can do is bury our kids. We've got to think about that," he said, expressing condolences to Dr Reddy's family and friends.
"I ask you all to think about her family right now and about giving them the space to actually to be in this space."
Dr Reddy was first reported missing by her family on Sunday after she failed to come home from the dental convention at St Leonards.
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.
CCTV footage shows Ms Reddy at a McDonald's inside the Strand Arcade in Sydney's CBD about 2.15am on Sunday. She can be seen wearing a long-sleeve black shirt, black pants and black ballet flats.
Her sister, Nithya Reddy, posted on Facebook that she had previously been located at Hotel Urban in Greenwich on Sydney's lower north shore.
A Facebook page set up to help find Dr Reddy said it was "highly out of character for Preethi to not contact family and loved ones".
Police had previously disseminated images of Dr Reddy and her grey Volkswagen Golf and Sydney City Police Area Command established Strike Force Carlwood in an effort to locate her.
The Glenbrook dental surgery where Dr Reddy worked was closed on Wednesday with a sign on the door that said: "Due to tragedy concerning our beloved colleague, the surgery will be closed for the time being. We appreciate your understanding during this delicate time".
Full statement from Dr Reddy's sister, Nithya
"Words cannot capture the pain we are feeling with the passing of my beautiful big sister.
Preethi was a bright light; loveable, kind, and protective of all whom were lucky enough to have been loved and cared for by her.
Prior to this unthinkable event, she had been the happiest I’d ever seen her – she he was living her best life.
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.
While we now know that Preethi is no longer with us, the certainty of her movements on Saturday night and Sunday morning are not yet fully known, and we will stay in touch with detectives as they work it all out.
To the media, thank you for your assistance thus far, but please respect that our family, particularly my parents and Preethi’s partner, are going through the hardest thing that anyone can endure, and please respect that we need our privacy right now.
We ask that everyone keep that in mind that we are grieving and we need space to do that.
Finally, let the police do what they need to do to solve this horrific tragedy. Our family will never be the same without Preethi our lives.
Please let her beautiful soul Rest In Peace."
Anyone with information about this incident is urged to contact Crime Stoppers: 1800 333 000 or https://nsw.crimestoppers.com.au.
If you are struggling mentally contact lifeline crisis support and suicide prevention on 13 11 14 or visit lifeline.org.au.