Sporting a red Economic Freedom Fighters beret, red shirt and black jacket, Mpofu joined other Malema supporters waiting near the court entrance for Malema to arrive.
Mpofu is the lawyer representing the wounded and arrested Marikana mineworkers at the Farlam Commission of Inquiry into the shooting at the Lonmin platinum mine near Rustenburg last year, when 34 people were killed.
He recently announced he had resigned from the African National Congress to join the EFF.
A large contingent of international and local journalists also gathered outside the court where Malema was due to launch a bid to have charges against him dropped.
Earlier on Thursday, hundreds of Economic Freedom Fighters members blew vuvuzelas and some waved knobkerries as they chanted songs against President Jacob Zuma.
“Muso wa Zuma reya o menola [we will unseat Zuma’s government],” they sang.
Traffic was bumper-to-bumper, with streets around the court closed.
The expelled former ANC Youth League leader faces charges of fraud, corruption, money-laundering, and racketeering.
It is alleged that he made nearly R4 million from corrupt activities.
Malema is out on R10,000 bail. His four co-accused, who are his business associates, are out on bail of R40,000 each.
On Thursday, the EFF leader was expected to make representations to the judge in an attempt to have the charges against him dropped.
The State alleges that the five misrepresented themselves to the Limpopo roads and transport department, leading to a R52m contract being awarded to On-Point Engineering.
According to court papers, Malema had business ties with Lesiba Gwangwa, one of the co-accused and a director of On-Point Engineering.
Malema’s Ratanang Family Trust was an indirect shareholder in On-Point.
The department paid the company R43m. According to the charge sheet, Malema substantially benefited from this payment, using it to buy a farm and a Mercedes-Benz.
If the charges are not dropped, Malema’s trial will be heard from September 30 to October 31 next year.