The Risk Professional: It's the little things that often give the game away

What Customs found surprised even the normally unflappable team: ten couriers were carrying at least 800g of amphetamines - in their shoes. The street value of the haul is estimated at as much as AUD8 million - the biggest in New Zealand's history - and with ten arrests, the most people picked up at any one time.

The total amount was a little more than 8kg.

Customs investigators say that the group - all Malaysians - had been offered a free holiday in New Zealand and assured that the method of carrying the drugs was safe.

The ten were part of a package tour and NZ authorities say that the others on the tour are entirely innocent. But the practice of "embedding" couriers within genuine tour groups is designed to make them appear normal. Customs say that a similar ploy was used by a gang from Taiwan last year but Customs stopped them, too.

Due Diligence Information:

Yuen Fatt Wong, 61, Teng-Kim Ooi, 52, Eng Hin Ong, 39, Ewe Hoe Ong, 40, Tan Ah Nya. 51, Waihong Leong, 23, Sit Mooi En, 29, Lian Fong Wong, 53, Eng Wan Teoh, 22, and Ah Kooi Teoh, 21, were remanded in custody to reappear next month. All carry Malaysian passpoprts.

Earlier this month, Malaysian authorities arrested nine Iranians and seized more than 70kg of methamphetamine. Malaysian authorities said that their information was that the gang was making supplies to New Zealand, Australia, Japan and Indonesia as well as within Malaysia.