A corruption case involving two police inspectors was postponed in the Johannesburg magistrate's court yesterday.
Prosecutor Colleen Ryan told the court that one of the accused policemen, Tello Mota, would have to make another bail application if he wanted to be released from custody.
Ryan said it was impossible for the state to continue with the trial without the other accused being present.
Mota, of Johannesburg Central police station, and Sean Thwala, of Booysens police station, face charges of corruption, extortion, fraud, intimidation and defeating the ends of justice.
A key witness, Lindiwe Mthembu, 37, was shot dead in her Johannesburg flat three days before she could testify against the two policemen.
Johannesburg Central police spokesman Xoli Mbele said investigations were still underway to trace her killer.
Mthembu's husband, Petros, wanted to know why the police had made his wife a key witness against two of their own officers - without first placing her in a protection programme.
Mota and Thwala were arrested in September 2006 after the police received complaints about cops who went around Johannesburg taking money from people, intimidating them and offering them cars in exchange for cash.
Thwala, who is out on bail, also faces a corruption charge in a separate case.