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The Independent Police Investigative Directorate (IPID) is investigating rumours that a second police hit squad may be operating in KwaZulu-Natal, the Sunday Times reported.
Three members of the Port Shepstone Organised Crime Unit had already been arrested and charged.
Warrant Officer Basil Crouse, a senior officer from the unit, handed himself in on Friday in Hibberdene, 100km south of Durban.
He was charged with murder, attempted murder and possession of an unlicensed firearm, and released on bail of R5 000.
His brother, Captain Nico Crouse, and Warrant Officer Earnest Nkabane - both members of the unit - were arrested in August along with members of the Cato Manor unit, on charges of murder and racketeering.
They were likewise released on bail.
The IPID was re-opening its murder dockets and files dating back five years into cases involving the unit, the paper reported.
“We are also appealing for anyone with information on any cases to come forward,” IPID spokesman Moses Dlamini told the newspaper. - Sapa