The plan almost worked. But a Customs check of a Singapore Airlines arrival at Christchurch Airport in November 2017 brought it all down.
The 39.7kg of meth was concealed in 20 boxes of outdoor lights. Police were alerted. The meth was switched for a similar looking powder and allowed to be transported to its planned destination – a city warehouse.
Police kept the warehouse under surveillance for two weeks. Then Seal was spotted taking one of the 'meth' packages away.
He took it to his home in Shirley. Cooper arrived and took the package to his home in Northwood.
Police then pounced, launching simultaneous raids on the properties, and arresting both men.
It was New Zealand Trotting Cup day and Seal was partying in his pool with friends.
When police came through Cooper's door, he desperately tried to flush what he thought was the meth down the toilet.
Police believe the street value of the imported meth could have been worth up to $50 million.
Detective Sergeant Chris Power told The Star it wasn't known what sort of payment Cooper and Seal would have received for their role in the importation. But it would have been substantial, he said.
A kilogram of meth could return the seller between $160,000 and up to $1 million, depending on how it is sold, Detective Sergeant Power said.
"The why is always about money – pure and simple. Getting rich quick," he said.
On Monday, the pair pleaded guilty in the High Court at Christchurch to importing class A drugs. They were remanded in custody. A sentencing date has been tentatively set down for later this month.
In 2009, Cooper was jailed for two years and three months for his involvement in an unprovoked assault on a group of Danish and English tourists in the central city.
Vikash Singh, who owns a gym supplements company, met Cooper through friends about five years ago.
Mr Singh was surprised at Cooper's involvement with the drug importation.
Cooper was "a really genuine and caring person who made a big mistake."
"He's only ever been very helpful and caring to everyone around us, including myself. I never have had a bad word to say about him."
"(The body building community) was massively shocked when the news came out about the charges. No one really believed it. It was very unexpected," he said.
Seal's only previous brush with the law was for an assault on a former girlfriend, for which he received home detention.
Both men were involved in the "gym, party and bar scene," said Detective Sergeant Power.
They travelled to Europe together, visiting London, Amsterdam and the Tomorrowland festival in Belgium.
Cooper has refused to be formerly interviewed by police, but Seal told police after his arrest he was innocent.
Detective Sergeant Power said Seal had told police an "elaborate cover story," saying he and Cooper had been set up by an individual who police have not been able to find and believe is fictitious.
But Detective Sergeant Power said inquiries after the men were arrested clearly show gangs had masterminded the operation.
"Cooper is linked to a number of organised crime groups through his social media apps," he said.
A third person was arrested in Auckland in connection with the importation last year and is awaiting trial in Christchurch in August. His name remains suppressed.
Detective Sergeant Power said the third man was involved with "a cargo handling service, in a position of trust and responsibility."
Police inquiries have revealed the gangs organised the meth from Mexico.
They then stepped back and Cooper and Seal dealt with the planning and documentation to get it into Christchurch and its storage in the warehouse.
Cooper completed the importation documents but used a different address and phone number on the form.
Seal contacted the freight forwarding company, asking about the consignment and provided details about the delivery address, a business with a suppressed name.