Zane was arrested in Gauteng shortly after he was accused of tracking Charl Kinnear’s cellphone before his assassination, where Kinnear was shot dead outside his home in Bishop Lavis last month.
He has been charged with murder, conspiracy to commit murder, and the illegal interception of communication.
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He was laid to rest over the weekend.
Police Minister Bheki Cele, who was also at the funeral, said it was a huge loss and he would make sure no police officer rest till the circumstances surrounding his death is known.
Killian is expected to appear in the Bishop Lavis Magistrates Court.
However, the gunman who shot Kinnear and those who ordered his killing are yet to be arrested.
His colleagues described him as one of the country’s finest detectives.