The Malaysian police now say they will not release the body of Kim Jong-nam until they receive a DNA-sample from a family member to prove his identity.
Speaking with AFP news on Friday, the Selangor state police chief said no next-of-kin had come to claim the body and that they have to identify who it belongs to.
This contrasts with a statement made by the Deputy Prime Minister on Thursday, who confirmed the victim was the North Korean leader's half brother.
The police up till this point had officially referred to him as "Kim Chol," the name on the passport he was carrying.
The deputy prime minister also said the body would be released to the next-of-kin or Pyongyang once the medical examinations were finished.
North Korean embassy officials had attempted to claim the body before an autopsy took place, but were denied by the Malaysian authorities.
The post-mortem was completed on Wednesday and the results are expected to be announced over the weekend.
In the meantime the criminal investigation is ongoing and expanding further than initially expected.
Police have confirmed that two women have been arrested, and they are assumed to be the two who were seen approaching Kim at Kuala Lumpur airport and poisoning Kim.
One was found holding a Vietnamese passport and the other carrying an Indonesian one.
Another Malaysian male, believed to be the boyfriend of the Indonesian woman, has also been detained, but he is not thought to have been involved in the murder.
Local media reports are also saying that there is CCTV footage showing the two women at the airport a day prior to the murder, with four other men, apparently to survey the surroundings.
The police are said to be still looking for those men.
The identities of the two women are being investigated in conjunction with the Indonesian and Vietnamese authorities, as suspicions remain high that Kim was the target of an assassination by North Korean spies.
Kwon Jang-ho, Arirang News.