The appellant, a clinical psychologist, was appointed to conduct forensic work for the Family Advocate regarding a child access dispute between the second respondent (Powell) and Ms Petzer concerning their minor child, Byron. After providing a report in March 2004, the appellant began treating Byron therapeutically and supplemented her report in March 2005 while still treating the child. In April 2005, Powell lodged a complaint with the HPCSA alleging (1) multiple relationships (acting as both investigator and therapist) and (2) misdiagnosis and labelling him a liar. The committee of preliminary inquiry obtained an expert opinion from Prof Vorster, who recommended prosecution only on the multiple relationships charge. The committee resolved in May 2007 that an inquiry be held on this charge alone. A charge sheet with only the multiple relationships charge was approved in July 2007. Following postponements and Powell's insistence, the pro forma complainant added the misdiagnosis charge on 4 September 2009 without referring the matter back to the committee and relying on opinions obtained by Powell. The appellant challenged the legality of this additional charge.