"I do not know a Louise de Waal at all," he told the High Court sitting in the Palm Ridge Magistrate's Court in Alberton today.

Steyn testified that he went out to find a prostitute on the day of De Waal's murder in October 2011.

This would explain, he said, why his cellphone GPS coincidentally placed him near where De Waal's body was found.

He said he took the prostitute to the Hekpoort area because he was concerned his wife would come home.

Steyn's denial that he knew the murdered girl caused De Waal's mother to exclaim: "I don't believe it."

Judge Sita Kolbe warned if court was disrupted again, proceedings would be held in camera.

Steyn has pleaded not guilty to two counts of murder, 11 of rape, 10 of sexual assault, 10 of kidnapping, one of attempted sexual assault, and one of attempted kidnapping.

De Waal's family attended the proceedings. They wore badges with a picture of her face.

Members of rights group Woman and Men against Child Abuse were outside the court building.

Last Thursday, Kolbe postponed the matter to Monday morning as Steyn was sick and to give the defence more time to prepare. The State closed its case on Wednesday.