Modisane was originally thought to have died of natural causes but pathology tests later suggested otherwise.
Ngcobo made a brief appearance on Thursday.
The case was postponed to allow time for him to file an affidavit to support his bail application.
He is facing charges of premeditated murder and defeating the ends of justice.
He has faced criticism for his perceived relaxed attitude in court. He received a backlash on social media for laughing and joking with journalists and his mother during his court appearances.