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

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
  • On The Up
  • World
    • All World
    • Australia
    • Asia
    • UK
    • United States
    • Middle East
    • Europe
    • Pacific
  • Business
    • All Business
    • MarketsSharesCurrencyCommoditiesStock TakesCrypto
    • Markets with Madison
    • 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
    • CompaniesAged CareAgribusinessAirlinesBanking and financeConstructionEnergyFreight and logisticsHealthcareManufacturingMedia and MarketingRetailTelecommunicationsTourism
  • Opinion
    • All Opinion
    • Analysis
    • Editorials
    • Business analysis
    • Premium opinion
    • Letters to the editor
  • 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
    • Milford's Investing Place
  • 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
  • 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
  • Gisborne

Media

  • Video
    • All Video
    • NZ news video
    • 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
    • Cooking the Books
  • Cartoons
  • Photo galleries
  • Today's Paper - E-editions
  • Photo sales
  • Classifieds

NZME Network

  • Advertise with NZME
  • OneRoof
  • Driven Car Guide
  • BusinessDesk
  • Newstalk ZB
  • What the Actual
  • 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

Maggie Watson's mum not guilty by reason of insanity

Anna Leask
By Anna Leask
Senior Journalist - crime and justice·NZ Herald·
12 Oct, 2016 08:43 PM8 mins to read

Subscribe to listen

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

Listening to articles is free for open-access content—explore other articles or learn more about text-to-speech.
‌
Save

    Share this article

Maggie Renee Watson died in August last year. Photo / Supplied

Maggie Renee Watson died in August last year. Photo / Supplied

An Onehunga woman has been found not guilty of murdering her 4-year-old daughter on the grounds of insanity.

A hearing was held today at the High Court at Auckland for Evelyn Kathleen Sen, 44, who had been charged with murdering Maggie Renee Watson at their home in Onehunga on August 6 last year.

Sen burst into tears when Justice Matthew Downs ruled that the only reasonable verdict was not guilty by reason of insanity.

READ MORE
• Maggie Watson: a short life ended by a mother's insanity
• Insane: The Kiwi killers found not guilty

• Not guilty by reason of insanity - who decides?

The court heard she believed the child was possessed and being tortured. She fed the child pills to "save her".

Advertisement
Advertise with NZME.
Advertisement
Advertise with NZME.

She reportedly called police at 4am and when officers arrived at the Moana Ave home they found Maggie dead.

Sen was treated for what were described as "superficial injuries" and was in mental health care when her daughter's funeral was held.

She was charged with murder in February this year and pleaded not guilty. The trial had been scheduled for next month.

Advertisement
Advertise with NZME.

Dr Mhairi Duff, a psychiatric expert who has seen Sen since Maggie died, has given evidence at today's hearing, before Justice Matthew Downs, about the mother's "untreated psychotic delusions".

She said leading up to Maggie's death the child had been waking up in the night screaming.

Sen fed the child tablets at about midday on August 6 then took an overdose to kill herself.

Sen woke hours later, around dinner time, to find Maggie dead and was highly distressed that she herself was still alive.

Discover more

New Zealand|crime

A short life ended by a mother's insanity

13 Oct 01:00 AM
New Zealand|crime

Demons, possession and killing Maggie

13 Oct 06:30 AM

She took a second overdose and then cut her wrists in a bid to end her life.

"She realised her daughter was dead and took a further overdose. She moved around the house in a distressed state," Duff told the court.

She said there were blood trails around the house and the words "Pastor John" written in blood in the kitchen.

She explained that Sen had been raised as a religious person and had strong beliefs.

Sen's diary contained writings about scriptures that were "unconventional and bizarre".

"At the time of [Maggie's death] she was labouring under a complex delusional belief system.

Advertisement
Advertise with NZME.

"She believed her daughter was being tortured and at risk of possession. Her evidence for this came from a delusional belief system," Duff said in evidence.

"Her daughter would wake up screaming in the night. Night after night - and [Sen] could not bear her suffering.

"She did not think these were nightmares, that they related to real events. Rather, this was evidence of possession by evil spirits, that her daughter was already experiencing torture."

Duff said Sen "needed to save and protect" Maggie.

She feared for the child's soul and did not think anyone else could help her.

"She thought of killing herself and her daughter, but had been able to resist. She believed if she killed her daughter her daughter would die an innocent and accepted into heaven.

Advertisement
Advertise with NZME.

"She accepted her own fate of going to hell."

Duff said Sen knew what she had done was morally wrong, and she was distressed that she would go to hell, that she had sinned.

But at the time of the killing she thought she was doing the only thing she could for her daughter.

Justice Matthew Downs concluded Sen was not guilty for the death of Maggie.

"I accept the only reasonable verdict is one of not guilty by reason of insanity," he said.

"Clearly she was mentally unwell. I am satisfied that the defendant suffered a disease of the mind at the time she killed Maggie."

Advertisement
Advertise with NZME.

Justice Downs said when Sen killed Maggie she believed she was acting morally.

"She believed she and her daughter were posessed by demons," he said.

Her beliefs combined with her mental disorder were so intense that Sen was rendered incapable of knowing whether her actions were right or wrong.

Justice Downs has made an order detaining Sen as a special patient.

She will be held indefinitely as a patient at a forensic psychiatric facility.

He said vulnerable people who came into Sen's care were at risk and equally as importantly, Sen needed care for her mental disorder.

Sen was also at risk of suicide or self harm.

Advertisement
Advertise with NZME.

"I have no doubt a special patient order is necessary," he said.

Investigation head Detective Inspector Hayden Mander said: "We note the judgment of the court in this matter and offer our ongoing condolences to Maggie's family."

Maggie's last hours

Sen took her daughter to the beach on August 6 and the pair returned to their Moana Ave home about lunchtime.

There would be no further human contact with the pair until Sen called 111 at 4am the next morning.

Duff said Sen was sitting at the kitchen table when she decided to kill the little girl.

She was overwhelmed with concern for Maggie and felt the "only solution" was to kill her, and then kill herself.

"It came to her very suddenly in clarity," Duff said.

Advertisement
Advertise with NZME.

She said Sen told her: "Now is the time. This is where I must act."
Sen gave Maggie a large dose of mirtazapine, an antidepressant used to treat major depressive disorder.

She then took pills herself.

But the dose was not enough and she woke hours later.

She knew what she had done was wrong, and was panicked about going to hell.

"I must have been demonically possessed. The devil got inside my head. It was wrong," Sen told Duff.

Duff said despite having "untreated psychiatric delusions" she had managed to function as a mother and cared well for Maggie until her death.

Advertisement
Advertise with NZME.

"There was no indication that the child had been neglected or abused," Duff told the court.

"There was no indication that the act on the day was anything other than an attempt by a good mother to protect her child from an unacceptable fate that no one else was able to help her escape," she said.

"She believed this act was morally right.

"She had a clear intention to kill herself as well as her daughter. She continues to ask herself why she lived and her daughter died."

The court heard when police arrived at the house in the early hours of August 7 they found Maggie dead in the lounge.

There was evidence of rigor mortis and it was clear the little girl had been dead for some time.

Advertisement
Advertise with NZME.

A post-mortem examination would later reveal Maggie's body contained more that 130 times an adult's dosage of mirtazapine.

A finding of insanity

Today's hearing was being held under section 20 of the Criminal Procedure (Mentally Impaired Persons) Act 2003.

That section states that before or at a trial a judge must find the defendant not guilty on account of insanity if:
• The defendant indicates he or she intends to raise the defence of insanity; and
•The prosecution agrees the only reasonable verdict is not guilty on account of insanity; and
•The judge is satisfied, on the basis of expert evidence, that the defendant was insane within the meaning of section 23 of the Crimes Act 1961 at the time the offence was committed.

In most New Zealand cases when someone is acquitted of a crime on insanity grounds, the presiding judge orders them detained as a special patient.

They remain detained at a forensic mental health facility until the Minister of Health or National Director of Mental Health deem they are no longer a risk to themselves or others.

Why the media were banned from filming Sen in court


Justice Matthew Downs declined media applications to film Sen in court after hearing from defence lawyer Stephen Bonnar, QC, and Crown prosecutor Brett Tantrum.

Bonnar said it was "beyond dispute" that his client was suffering, and had been suffering "for a long time from a significant mental illness".

"The circumstances under which she comes before the court can only be described as tragic," he told the court.

"It is important that her ongoing treatment is able to proceed and continue without the additional trauma and added distraction which might occur by her image being splashed across national media.

"I accept the media have a role and a duty and a right to report on these proceedings and they can do so. There is no added public interest in simply having [Sen's] image splashed everywhere.

"I go as far as to say that given the circumstances and her mental illness it would be bordering on inhumane to permit filming of photography at this time of intense emotional anguish for her and her family."

Tantrum also opposed the media filming Sen, saying she still had "a level of unwellness" and he agreed with Bonnar's submission.

Justice Downs said he was satisfied that there should not be any filming or photography of the proceedings.

"The issue for determination is whether the defendant was insane when she killed her young daughter and if so, what should happen to her. I have already read expert evidence in connection with this case," he said.

"It is beyond doubt the defendant suffers a mental illness and that she continues to do so.

"An expert retained by her is of the opinion that if the proceeding was filmed or photographs were taken of her that could interfere with her treatment.

"Declining this aspect of the applications does not reasonably inhibit the media's right to report these proceedings.

"The case is unusual and the features I have mentioned tell against photography or filming."

Advertisement
Advertise with NZME.

Read Justice Matthew Downs' full ruling:

Save

    Share this article

Latest from New Zealand

New Zealand

Watch: Major highway blocked by slip, Auckland flights delayed as intense storm strikes

09 May 08:09 AM
Crime

Man's 11-day crime spree targets police by spitting and threatening to kill staff

09 May 08:00 AM
New Zealand

Auckland War Memorial Museum closed to public after asbestos discovery

09 May 07:49 AM

One tiny baby’s fight to survive

sponsored
Advertisement
Advertise with NZME.

Latest from New Zealand

Watch: Major highway blocked by slip, Auckland flights delayed as intense storm strikes

Watch: Major highway blocked by slip, Auckland flights delayed as intense storm strikes

09 May 08:09 AM

Motorists are being warned to expect hazardous driving conditions.

Man's 11-day crime spree targets police by spitting and threatening to kill staff

Man's 11-day crime spree targets police by spitting and threatening to kill staff

09 May 08:00 AM
Auckland War Memorial Museum closed to public after asbestos discovery

Auckland War Memorial Museum closed to public after asbestos discovery

09 May 07:49 AM
'We've had enough': Red Square protest opposes pay equity changes

'We've had enough': Red Square protest opposes pay equity changes

09 May 07:21 AM
Connected workers are safer workers 
sponsored

Connected workers are safer workers 

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
  • What the Actual
  • Newstalk ZB
  • BusinessDesk
  • OneRoof
  • Driven CarGuide
  • iHeart Radio
  • Restaurant Hub
NZME
  • About NZME
  • NZME careers
  • Advertise with NZME
  • Digital self-service advertising
  • Book your classified ad
  • Photo sales
  • NZME Events
  • © Copyright 2025 NZME Publishing Limited
TOP