Mpumalanga police is investigating a case of culpable homicide after a 46-year-old traffic officer was killed when he was hit by a taxi on Friday on the N2 between Piet Retief and Ermelo.Provincial spokesperson for the Department of Community Safety, Security and Liaison, Moeti Mmusi said Jabulane Collen Ndlovu was hit by a taxi while trying to stop it when he was conducting a speed law enforcement operation.Mmusi said the taxi was travelling from the direction of Ermelo towards Piet Retief.After the accident, he was rushed to a nearby hospital in Piet Retief and later succumbed to his…