The Hawks are investigating whether Eugene Terre Blanche's death had been a sex crime, says spokesman Musa Zondi.
However, he said this was not the only possibility the Directorate for Priority Crime Investigations was investigating.
"We are looking into that and everything else," said Zondi.
The Hawks, he said, were considering other possibilities that may have lead to the murder of Terre Blanche, including that of a labour dispute.
He said clothes that were worn by the two suspects, 28-year-old Chris Mahlangu and a 15-year-old boy, who cannot be named, on the day of the murder were sent for forensic investigations.
He denied that a used condom was found in the room where Terre'Blanche's body was found.
Earlier when Sapa phoned North West police spokeswoman Adele Myburgh who was first to quash the allegations that a used condom had been found on the scene, she said she was taken off the Terre Blanche case.
She said that she would not give media comment about the case as part of an "internal" process, which she said "I respect".
Myburgh had come out strongly denying the allegations.
"There was no condom found on the scene of the late Mr Eugene Terre Blanche. I'm prepared to put my neck in a guillotine and you can have a go at it if I have been lying," Myburgh had told Sapa on Saturday.
Meanwhile, the Sunday Times newspaper reported that Mahlangu, through his lawyer, claimed to have been sodomised by Terre Blanche.
The newspaper quoted attorney Puna Moroko as saying: "My instructions from my client are that there was some sodomy going on and it sparked the murder of Mr Terre'Blanche. This is going to form part of our defence during trial".
Moroko also claimed that Terre Blanche tried to get the accused drunk before he allegedly tried to have sex with them.
It was previously reported that Terre Blanche had bought whisky and several bottles of cider on the day he was murdered.
Eugene Terre Blanche was murdered on April 3 on his farm outside Ventersdorp.
Mahlangu, and the minor, have since been charged with murder, house breaking and robbery with aggravating circumstances and attempted robbery with aggravating circumstances.
They appeared in court on Tuesday and their case was postponed to April 14. The two had not yet pleaded to the charges.
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