Cold case: Detective to continue testifying

Captain Gerhard Van Wyk can expect to spend the rest of the week being questioned.

FILE: The Betty Ketani murder trial is underway in the Palm Ridge Magistrates Court. Picture: Christa van der Walt/EWN

JOHANNESBURG - The police detective in charge of the Betty Ketani murder case has defended the use of private investigators who the defence has accused of tampering with a crucial crime scene.

Captain Gerhard van Wyk faced cross-examination and has returned to the witness box for a fifth day.

He is testifying about how the discovery of a confession under a carpet led to the arrest of the three men now on trial and how the 15-year-old crime was investigated.

Van Wyk can expect to spend the rest of the week being questioned about each and every step of his investigation.

The defence has already claimed the shallow grave where bones were found was contaminated and has accused the police of letting civilians make arrests and seize important evidence.

Van Wyk inherited the case from another group of detectives, but has defended the investigation.

"We often make use of private investigators to assist us with investigations. They also request us to assist them with investigations."

The defence is arguing that the accused are being framed.