LISTEN: Voice note played during Siam Lee case

Advocate Martin Krog, who is acting on behalf of the 29-year-old businessman, played the clip while investigating officer, Warrant Officer Rajen Govender was on the stand.

The accused cannot be named at this stage.

Krog told the court that he had already played the clip for Govender and Public Prosecutor, Surekha Marimuthu in March.

The man speaking in the voice note claims the accused confessed to another rape while "wearing a KFC packet."

NOW READ: Siam Lee: Private investigator suspected of jeopardising case

There was a stunned silence in court when  voice that Krog says he will assert and prove is Nathanson's boomed through a speaker the defence had brought in.

Some people in the gallery appeared the cringe when a string of expletives were used and again when the voice said the Siam Lee kidnapping and murder accused had confessed to another rape while "wearing a KFC packet."

Krog said afterwards that by "wearing a KFC packet" he had meant 'over his head'.

ALSO READ: Siam Lee murder case: Investigator details arrest of suspect

He told the court Nathanson had made it clear that he tortured the accused and that he was bragging to his friends about it.

Lee went missing from outside a Durban North property in January.

Her disappearance sparked widespread anger across the city, with many people turning to social media to call for her safe return.

The 20-year-old's badly burnt body was found two days later on a farm in New Hanover in the KwaZulu-Natal Midlands

You can listen to the clip played out in court below. Please note, the content is not be suitable for sensitive listeners: