NZ Herald
  • Home
  • Latest news
  • Herald NOW
  • Video
  • New Zealand
  • Sport
  • World
  • Business
  • Entertainment
  • Podcasts
  • Quizzes
  • Opinion
  • Lifestyle
  • Travel
  • Viva
  • Weather

Subscriptions

  • Herald Premium
  • Viva Premium
  • The Listener
  • BusinessDesk

Sections

  • Latest news
  • New Zealand
    • All New Zealand
    • Crime
    • Politics
    • Education
    • Open Justice
    • Scam Update
    • The Great NZ Road Trip
  • Herald NOW
    • All Herald NOW
    • Ryan Bridge TODAY
    • Herald NOW Business
  • On The Up
  • World
    • All World
    • Australia
    • Asia
    • UK
    • United States
    • Middle East
    • Europe
    • Pacific
  • Business
    • All Business
    • MarketsSharesCurrencyCommoditiesStock TakesCrypto
    • Herald NOW Business
    • Media Insider
    • Business analysis
    • Personal financeKiwiSaverInterest ratesTaxInvestment
    • EconomyInflationGDPOfficial cash rateEmployment
    • Small business
    • Business reportsMood of the BoardroomProject AucklandSustainable business and financeCapital markets reportAgribusiness reportInfrastructure reportDynamic business
    • Deloitte Top 200 Awards
    • Deloitte Fast 50
    • Generate wealth weekly
    • CompaniesAged CareAgribusinessAirlinesBanking and financeConstructionEnergyFreight and logisticsHealthcareManufacturingMedia and MarketingRetailTelecommunicationsTourism
  • Opinion
    • All Opinion
    • Analysis
    • Editorials
    • Business analysis
    • Premium opinion
    • Letters to the editor
  • Politics
  • Sport
    • All Sport
    • OlympicsParalympics
    • RugbySuper RugbyNPCAll BlacksBlack FernsRugby sevensSchool rugby
    • CricketBlack CapsWhite Ferns
    • Racing
    • NetballSilver Ferns
    • LeagueWarriorsNRL
    • FootballWellington PhoenixAuckland FCAll WhitesFootball FernsEnglish Premier League
    • GolfNZ Open
    • MotorsportFormula 1
    • Boxing
    • UFC
    • BasketballNBABreakersTall BlacksTall Ferns
    • Tennis
    • Cycling
    • Athletics
    • SailingAmerica's CupSailGP
    • Rowing
  • Lifestyle
    • All Lifestyle
    • Viva - Food, fashion & beauty
    • Society Insider
    • Royals
    • Sex & relationships
    • Food & drinkRecipesRecipe collectionsRestaurant reviewsRestaurant bookings
    • Health & wellbeing
    • Fashion & beauty
    • Pets & animals
    • The Selection - Shop the trendsShop fashionShop beautyShop entertainmentShop giftsShop home & living
  • Entertainment
    • All Entertainment
    • TV
    • MoviesMovie reviews
    • MusicMusic reviews
    • BooksBook reviews
    • Culture
    • ReviewsBook reviewsMovie reviewsMusic reviewsRestaurant reviews
  • Travel
    • All Travel
    • News
    • New ZealandNorthlandAucklandWellingtonCanterburyOtago / QueenstownNelson-TasmanBest NZ beaches
    • International travelAustraliaPacific IslandsEuropeUKUSAAfricaAsia
    • Rail holidays
    • Cruise holidays
    • Ski holidays
    • Luxury travel
    • Adventure travel
  • Kāhu Māori news
  • Environment
    • All Environment
    • Our Green Future
  • Talanoa Pacific news
  • Property
    • All Property
    • Property Insider
    • Interest rates tracker
    • Residential property listings
    • Commercial property listings
  • Health
  • Technology
    • All Technology
    • AI
    • Social media
  • Rural
    • All Rural
    • Dairy farming
    • Sheep & beef farming
    • Horticulture
    • Animal health
    • Rural business
    • Rural life
    • Rural technology
    • Opinion
    • Audio & podcasts
  • Weather forecasts
    • All Weather forecasts
    • Kaitaia
    • Whangārei
    • Dargaville
    • Auckland
    • Thames
    • Tauranga
    • Hamilton
    • Whakatāne
    • Rotorua
    • Tokoroa
    • Te Kuiti
    • Taumaranui
    • Taupō
    • Gisborne
    • New Plymouth
    • Napier
    • Hastings
    • Dannevirke
    • Whanganui
    • Palmerston North
    • Levin
    • Paraparaumu
    • Masterton
    • Wellington
    • Motueka
    • Nelson
    • Blenheim
    • Westport
    • Reefton
    • Kaikōura
    • Greymouth
    • Hokitika
    • Christchurch
    • Ashburton
    • Timaru
    • Wānaka
    • Oamaru
    • Queenstown
    • Dunedin
    • Gore
    • Invercargill
  • Meet the journalists
  • Promotions & competitions
  • OneRoof property listings
  • Driven car news

Puzzles & Quizzes

  • Puzzles
    • All Puzzles
    • Sudoku
    • Code Cracker
    • Crosswords
    • Cryptic crossword
    • Wordsearch
  • Quizzes
    • All Quizzes
    • Morning quiz
    • Afternoon quiz
    • Sports quiz

Regions

  • Northland
    • All Northland
    • Far North
    • Kaitaia
    • Kerikeri
    • Kaikohe
    • Bay of Islands
    • Whangarei
    • Dargaville
    • Kaipara
    • Mangawhai
  • Auckland
  • Waikato
    • All Waikato
    • Hamilton
    • Coromandel & Hauraki
    • Matamata & Piako
    • Cambridge
    • Te Awamutu
    • Tokoroa & South Waikato
    • Taupō & Tūrangi
  • Bay of Plenty
    • All Bay of Plenty
    • Katikati
    • Tauranga
    • Mount Maunganui
    • Pāpāmoa
    • Te Puke
    • Whakatāne
  • Rotorua
  • Gisborne
  • Hawke's Bay
    • All Hawke's Bay
    • Napier
    • Hastings
    • Havelock North
    • Central Hawke's Bay
    • Wairoa
  • Taranaki
    • All Taranaki
    • Stratford
    • New Plymouth
    • Hāwera
  • Manawatū - Whanganui
    • All Manawatū - Whanganui
    • Whanganui
    • Palmerston North
    • Manawatū
    • Tararua
    • Horowhenua
  • Wellington
    • All Wellington
    • Kapiti
    • Wairarapa
    • Upper Hutt
    • Lower Hutt
  • Nelson & Tasman
    • All Nelson & Tasman
    • Motueka
    • Nelson
    • Tasman
  • Marlborough
  • West Coast
  • Canterbury
    • All Canterbury
    • Kaikōura
    • Christchurch
    • Ashburton
    • Timaru
  • Otago
    • All Otago
    • Oamaru
    • Dunedin
    • Balclutha
    • Alexandra
    • Queenstown
    • Wanaka
  • Southland
    • All Southland
    • Invercargill
    • Gore
    • Stewart Island

Media

  • Video
    • All Video
    • NZ news video
    • Herald NOW
    • Business news video
    • Politics news video
    • Sport video
    • World news video
    • Lifestyle video
    • Entertainment video
    • Travel video
    • Markets with Madison
    • Kea Kids news
  • Podcasts
    • All Podcasts
    • The Front Page
    • On the Tiles
    • Ask me Anything
    • The Little Things
  • Cartoons
  • Photo galleries
  • Today's Paper - E-editions
  • Photo sales
  • Classifieds

NZME Network

  • Advertise with NZME
  • OneRoof
  • Driven Car Guide
  • BusinessDesk
  • Newstalk ZB
  • Sunlive
  • ZM
  • The Hits
  • Coast
  • Radio Hauraki
  • The Alternative Commentary Collective
  • Gold
  • Flava
  • iHeart Radio
  • Hokonui
  • Radio Wanaka
  • iHeartCountry New Zealand
  • Restaurant Hub
  • NZME Events

SubscribeSign In

Advertisement
Advertise with NZME.
Home / New Zealand

Whenuapai homicide: Crumpet tossed at friend, room smashed up in night of fights

John Weekes
John Weekes
Senior Business Reporter·NZ Herald·
11 Aug, 2021 05:37 AM4 mins to read
‌

Subscribe to listen

Access to Herald Premium articles require a Premium subscription. Subscribe now to listen.
Already a subscriber?  

Listening to articles is free for open-access content—explore other articles or learn more about text-to-speech.
‌
Save
    Share this article
Armed police outside the Trig Rd property where Coubin Tamatoa was killed last year. Photo / Dean Purcell

Armed police outside the Trig Rd property where Coubin Tamatoa was killed last year. Photo / Dean Purcell

In a wild night of fights and meltdowns ending in a fatal stabbing, a man left his best friend on the brink of tears after throwing a crumpet at him.

The late Coubin Tamatoa's friends outlined his final hours to jurors at the High Court in Auckland today.

Isaac Allen Harnwell has pleaded not guilty to murdering Tamatoa, who died at a sprawling Whenuapai property in August last year.

The Crown says Harnwell hated Tamatoa with a passion and hid in a room for hours, then plunged a knife into his chest and eye before fleeing.

The defence says Tamatoa was enraged and jealous during a drug-addled evening of mayhem, and Harnwell was defending himself or Tamatoa's ex-girlfriend.

Advertisement
Advertise with NZME.
Advertisement
Advertise with NZME.

The court today heard from Asotasi Tiatia, who said he was Tamatoa's best friend.

Jurors heard Tamatoa sent Tiatia a message at 11.17pm on August 4, asking for help.

"He said: Uso [brother], I need you on standby, I need you in the area."

Advertisement
Advertise with NZME.

Tiatia said he took this to mean Tamatoa was worried about something.

He said he asked what Tamatoa meant, but got no reply, and went to the Trig Rd property anyway.

"If he ran into any trouble, I was right there."

Defence counsel Andrew Speed asked if "standby" referred to a standover, but Tiatia replied: "I don't know what you're talking about".

Discover more

New Zealand

Jurors return to High Court murder trial after month long pause for Covid-19 lockdown

22 Sep 05:00 PM
New Zealand

Whenuapai murder trial: Stab victim was 'deranged, nasty man' defence argues

23 Sep 05:01 AM

A few days before the stabbing, Tamatoa stole the meth precursor ephedrine from his ex-girlfriend Ranee Rapihana, and Harnwell said he was shot at.

Advertisement
Advertise with NZME.

"Aren't you curious about what he wanted you to do, and why?" Speed asked Tiatia today. "Are you a mechanic, an electrician?"

Tiatia, nicknamed "Gusa", said he was there to help with whatever was needed, such as "doing the dishes".

He said multiple arguments erupted that night and he stopped one fight involving Tamataoa and another man, but Tamatoa flared up again and harassed Rapihana.

Tiatia said that disturbed him, and he told Tamatoa to treat Rapihana better, but his friend responded unpleasantly.

"He told me to f*** up."

Advertisement
Advertise with NZME.

He said Tamatoa threw a crumpet at him, which was upsetting, and made him leave.

BEDROOM TRASHED

Monique Darby was also at the Trig Rd property that night, and said Tiatia left "because Coubin was being a bit of an egg".

She said Tamatoa had a meltdown with Rapihana.

"Gusa told him that he had to stop causing scenes and breaking things. Coubin threw a crumpet and said 'I don't get involved with you and your girlfriend'."

She added: "Gusa was tearing up and said he couldn't do this anymore."

Tamatoa got into his car and performed skids or donuts. "It was just him letting us know he was leaving," Darby said.

But the absence was brief. And his argument with Rapihana resumed.

"He came flying in. He was angry," Darby said. "It was a bit emotional. Both of them were just really upset."

A bedroom was wrecked and then Darby saw Tamatoa leave.

Advertisement
Advertise with NZME.

"You could just see he was trying to hold tears back."

Darby said she heard thumping and Tamatoa returned from another bedroom to a hallway about 20-30 seconds later.

"He was holding his eye and saying 'Aah, what the f***?'"

At the High Court in Auckland, Isaac Allen Harnwell has pleaded not guilty to murder. Photo / File
At the High Court in Auckland, Isaac Allen Harnwell has pleaded not guilty to murder. Photo / File

Rapihana told jurors Harnwell gave Tamatoa money and meth on Tamatoa's birthday, July 25.

"There was no bad anything between them but I knew that Coubin didn't like him really."

Jurors heard the ephedrine theft provoked disquiet among gang members and other background figures.

"I was only in that situation because of him, and it's all coming to a head," Rapihana said.

Jurors heard Tamatoa pressed a handgun into her neck and threatened to kill her a few hours before he was stabbed.

The pair kept arguing but also took drugs together, including GBL.

"His doses kicked in. He gets hot, he takes his clothes off and gets a bit loud. He'll stomp his feet," she said when asked to describe the drug's effect.

Advertisement
Advertise with NZME.

She said Tamatoa had a 4ml dose of GBL, measured with a syringe.

Rapihana said her relationship with Tamatoa was toxic and volatile.

She said her ex-boyfriend would accuse her of having affairs with many people but he would never confront the accused person.

The trial before Justice Mathew Downs and the jury continues.

Save
    Share this article

Latest from New Zealand

New Zealand

NZ Herald Afternoon Headlines | Saturday, 9th May, 2026

Watch
09 May 01:08 AM
New Zealand
|Updated

Son of a murdered mother becomes a murderer

09 May 01:00 AM
Premium
New Zealand

Top Trump tech ally handpicks Auckland teen maths star for prestigious Oxford scholarship

09 May 01:00 AM

Sponsored

Future of wealth in NZ: A conversation with ASB CEO Vittoria Shortt

03 May 11:20 PM
Advertisement
Advertise with NZME.

Latest from New Zealand

NZ Herald Afternoon Headlines | Saturday, 9th May, 2026
New Zealand

NZ Herald Afternoon Headlines | Saturday, 9th May, 2026

NZ Herald Afternoon Headlines | Saturday, May 9, 2026. Raw sewage spilt in Wellington's south coast after rain overnight. Video / NZ Herald

Watch
09 May 01:08 AM
Son of a murdered mother becomes a murderer
New Zealand
|Updated

Son of a murdered mother becomes a murderer

09 May 01:00 AM
Premium
Premium
Top Trump tech ally handpicks Auckland teen maths star for prestigious Oxford scholarship
New Zealand

Top Trump tech ally handpicks Auckland teen maths star for prestigious Oxford scholarship

09 May 01:00 AM


Future of wealth in NZ: A conversation with ASB CEO Vittoria Shortt
Sponsored

Future of wealth in NZ: A conversation with ASB CEO Vittoria Shortt

03 May 11:20 PM
NZ Herald
  • About NZ Herald
  • Meet the journalists
  • Newsletters
  • Classifieds
  • Help & support
  • Contact us
  • House rules
  • Privacy Policy
  • Terms of use
  • Competition terms & conditions
  • Our use of AI
Subscriber Services
  • NZ Herald e-editions
  • Daily puzzles & quizzes
  • Manage your digital subscription
  • Manage your print subscription
  • Subscribe to the NZ Herald newspaper
  • Subscribe to Herald Premium
  • Gift a subscription
  • Subscriber FAQs
  • Subscription terms & conditions
  • Promotions and subscriber benefits
NZME Network
  • The New Zealand Herald
  • The Northland Age
  • The Northern Advocate
  • Waikato Herald
  • Bay of Plenty Times
  • Rotorua Daily Post
  • Hawke's Bay Today
  • Whanganui Chronicle
  • Viva
  • NZ Listener
  • Newstalk ZB
  • BusinessDesk
  • OneRoof
  • Driven Car Guide
  • iHeart Radio
  • Restaurant Hub
NZME
  • About NZME
  • NZME careers
  • Advertise with NZME
  • NZME Digital Performance Marketing
  • Book your classified ad
  • Photo sales
  • NZME Events
  • © Copyright 2026 NZME Publishing Limited
TOP