Qandeel Baloch, 26, who is described as Pakistan’s Kim Kardashian, divided opinion in the deeply conservative Muslim society with her risque photographs.
She was killed on Friday in a so-called ‘honour killing’ which has sparked global arguments on the disturbing issue.
Ms Baloch’s brother, Muhammad Waseem, told media he drugged and strangled his sister as she had violated their family’s honour with her social media posts, including a series of selfies with cleric Abdul Qavi, last month.
The model revealed her legs and parts of her chest in pictures in which she posed provocatively for the camera.
In one video she sits closely next to the cleric talking about her views on the burka.
The posts with the cleric sparked public outcry with religious conservatives branding her a disgrace to the cultural values of Islam and Pakistan.
During a video posted with Qavi, Ms Baloch is believed to state the veil should not be needed as men should be able to control themselves around women.
On Ms Baloch’s Instagram page, a social media user said they had translated what Ms Baloch said in one video with Qavi.
They said: “Basically [Ms Baloch] is saying that the veil (which is the burka etc and any form of clothing with excessively covers yourself) should be in your eyes, not in your clothing.
“So if someone is disturbed by how a woman is dressed, if she’s wearing a short dress or a tank top, it’s only because their mind is sick and perverted and if it bothers them so much they can turn their eyes the other way.
“And how clothing doesn’t shouldn’t define a woman. And she is asking the mullah to explain his opinion on it.”
Fans have hailed her as a “feminist icon”.
Police said Qavi, who was suspended from a prominent Muslim council after the photographs were published, was also part of their investigation into her murder.
Azhar Ikram, the police chief in the town of Multan, where Ms Baloch was killed, said: “We have decided to widen the scope of the investigation and include Mufti Abdul Qavi in the probe.”
Qavi has denied any involvement in Ms Baloch’s murder but said on Monday he would present himself to police for questioning if summoned.
Qavi told media on Saturday Ms Baloch’s death should serve as an example for others who tried to malign the clergy, though he also said that he had “forgiven her”.
Ms Baloch, who described herself as a modern day feminist, was unapologetic about her bid to push the boundaries of acceptability for women and change “the typical orthodox mindset” of Pakistanis.
Police were also investigating Baloch’s other brother, Muhammad Aslam, who is a junior army officer, Mr Ikram said.
More than 500 people – almost all of them women – die in so-called ‘honour killings’ in Pakistan every year, usually at the hands of relatives acting over a perception “shame” has been brought on the family.
Governments have deplored the practice but done little to stop it. Many Pakistanis have called for the passage of an anti-honour killing law aimed at closing a loophole that allows family members to forgive those responsible for such killings.
After Ms Baloch’s death her father, Muhammad Azeem, filed a police report against both his sons, alleging Aslam had encouraged Waseem to carry out the killing.
Police have declined to comment on Aslam’s role and he was not available for comment on Monday.
Ms Baloch built a modelling career on the back of her social media fame and was the family breadwinner.
After her death her father, Muhammad Azeem, filed a police report against both his sons, alleging Aslam had encouraged Waseem to carry out the killing.
He said: ”She was my son, not a daughter. I have lost my son.
“She supported all of us, including my son who killed her.”
Azeem was also not available for comment.
After the outcry over the selfies with Qavi, Ms Baloch held a news conference and appealed to the interior ministry to provide her with security but her request was not fulfilled.