A New Zealand teenager was nabbed when he went back to a shop he robbed four hours earlier to buy goods with the money he had stolen, a newspaper reported Saturday. A shop assistant in Porirua, near Wellington, recognised the voice of the masked 16-year-old who had demanded cash at knifepoint. She called police, who had just left after interviewing her about the theft, the Dominion Post said. Police charged the youth with aggravated robbery. --SP 0012 Local Time 2112 GMT