Cold case: Investigating officer in the firing line

Attacks on credibility & questions about his past greeted Captain Gerhard van Wyk on his return to court.

State witness and investigating officer in the Betty Ketani murder trial, captain Gerhard van Wyk. Picture: Alex Eliseev/EWN.

JOHANNESBURG - Fresh attacks on credibility and new attempts to break the chain of evidence greeted the investigating officer of the Betty Ketani murder case, as he returned to the witness stand.

Captain Gerhard van Wyk was hospitalised last month for stress but continued testifying on Monday against three men accused of the 15-year-old crime.

Ketani's murder emerged after the discovery of a hidden confession, which was placed under a carpet and remained there for years.

Van Wyk has been forced to account for just about every step he took during the investigation, including why a police dog handler was unable the bones that surfaced later.

"The dog reacts in gasses. If you're buried in a shallow grave, your gasses, he smells that. He won't smell old bones."

The bones, believed to belong to Ketani were sent to Bosnia for DNA tests, which are now fiercely disputed.

Van Wyk was also questioned about his own arrest and suspension 23 years ago in a case that saw him cleared of any wrongdoing.