Mark Warona Zinde's family is still pushing to have him mentally reassessed.

His lawyer Francois Joubert told the Brits Magistrate's Court on Tuesday the family instructed him to ask for his transfer to the medical section of Kgosi Mampuru prison in Pretoria.

This is where Zinde, 23, will be detained while awaiting trial for murder. It is set for June 12 to 23 at the North Gauteng High Court.

He is in the dock for allegedly killing his mother, Hope Zinde, 50, on June 11 last year. She was a former broadcast journalist and board member of the SABC.

Hope's body was found in the boot of her Range Rover SUV at the estate home she shared with Warona in Hartbeespoort, North West.

Joubert's attempts to have Zinde declared mentally unfit to stand trial have already been rejected twice.

In September last year, the Brits Magistrate's Court accepted a report by four psychiatrists from the Weskoppies Mental Hospital that he is mentally fit to stand trial.

Then last month, Joubert's application to have the psychiatrists' report set aside was dismissed.

Explaining the plea to keep Zinde at Kgosi Mampuru's medical section, Joubert told reporters: "We say he's not well. His mental condition is not healthy. He'll be referred to the medical section for further assessment, hopefully.

"He's absent-minded. You cannot really properly consult with him. You cannot properly talk to him. That's the problem."

Joubert said Zinde's reassessment was in the interest of justice.

"If he's not mentally well and fit to stand trial then it has to come out and it has to be assessed and investigated," he said.

Hannah Conradie, the prosecutor, did not oppose the plea.