Northamptonshire Police said the husband of Harshita Brella, 24, from Corby, is being sought in connection with her death but is thought to have fled the country.
On Sunday, police said they were looking for Pankaj Lamba, who they believe has left the country.
Police have said they believe Harshita Brella was murdered by her husband “earlier this month” and that he has since fled the country.
In a statement, Chief Inspector Paul Cash of Northamptonshire Police said: “Our inquiries lead us to suspect that Harshita was murdered in Northamptonshire earlier this month by her husband Pankaj Lamba.
“We suspect Lamba transported Harshita’s body from Northamptonshire to Ilford by car.
“We believe he has now fled the country.”
Police have released an image of Mr Lamba and urged anyone with any information that may assist inquiries, “no matter how small”, to contact the force.
The Northants Telegraph report Harshita Brell was previously the victim of domestic violence and just two months ago was made subject of a Domestic Violence Protection Order (DVPO) at Northampton Magistrates Court.
Police have urged anyone with information that could assist the investigation into Harshita Brella’s death to come forward.
A murder inquiry was launched after her body was found inside the boot of the vehicle in Brisbane Road, Ilford, in the early hours of Thursday.
The force was contacted on Wednesday by a member of the public concerned for her welfare.
Officers went to her home in Skegness Walk, Corby, but got no answer.
A missing person investigation was launched and her body was found in the car.
A post-mortem examination established that she had been murdered.
In a statement, Chief Inspector Paul Cash of Northamptonshire Police said: “I urge anyone listening to or reading this statement, that if you saw anything suspicious in the past week or have any information, no matter how small, please contact us.
“We would always rather receive well-meaning information that turns out to be nothing as opposed to not receiving it all.”
He added: “Anyone who has any information that could help detectives bring Harshita’s killer to justice, can contact the incident room by calling 101, quoting incident number Operation Westcott.
“Alternatively information can be submitted via our online public portal at www.mipp.police.uk or please feel free to call Crimestoppers, in confidence, on 0800 555111.”