A convicted murderer gives evidence in the South Australian District Court trial of a prison officer accused of raping an inmate at Adelaide’s women’s prison. The court hears testimony from the convicted murderer, who takes the stand to provide evidence relevant to the allegations against the prison worker. Multiple outlets report that the accused prison officer is facing charges relating to rape of an inmate, with the case being heard in the same court. While the sources provided do not detail the specific content of the murderer’s testimony or the defence and prosecution arguments, they consistently describe the central development: a person already convicted of murder testifies during the trial of the prison worker. The reporting indicates the proceedings are taking place as part of the District Court process in South Australia, with the alleged assault occurring at the women’s prison in Adelaide. The trial’s outcome, specific dates of the alleged offence, and further evidentiary details are not included in the supplied summaries.