WARNING: This story contains graphic and sensitive content.
Letters sent by Lauren Dickason after she was arrested for killing her three children to her husband - who found the little girls dead in their beds - have been revealed in court.
In the third week of Dickason鈥檚 trial a jury have heard that the couple corresponded by letter about the tragedy.
Graham Dickason reportedly wrote to his wife after the returned to South Africa saying he could not understand how the alleged murders had happened.
In reply, Dickason told her husband she had 鈥渄ifficulty understanding his lack of understanding鈥 given he had 鈥渂een there with her all through it鈥.
The letters were discussed in the High Court at Christchurch by Crown Prosecutor Andrew McRae during his cross-examination of a defence psych expert.
A jury will hear from a string of experts this week as to whether they think Dickason was so mentally disturbed when she killed her children that she cannot be held responsible - or if she became so angry she snapped and murdered them.
Dickason, 42, is charged with murdering Lian茅 - who was a week off her 7th birthday - and 2-year-old twins Maya and Karla at their Timaru home in September 2021.
The family had emigrated from South Africa and been in New Zealand less than a month when the girls died.
While Dickason admits she killed the children she has pleaded not guilty to the murder charges by reason of insanity or infanticide.
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Lauren Dickason during her police interview. Photo / Pool
She is on trial in the High Court at Christchurch before Justice Cameron Mander and a jury of eight women and four men.
The Crown alleges Dickason murdered the children in a 鈥渃alculated鈥 way because she was frustrated, angry and resentful of them.
It acknowledges Dickason suffered from sometimes-serious depression, it maintains she knew what she was doing when she killed the girls.
Last week,聽Crown Prosecutor Andrew McRae alleged Dickason was an angry and frustrated woman who was 鈥渞esentful of how the children stood in the way of her relationship with her husband鈥澛燼nd killed them 鈥渕ethodically and purposefully, perhaps even clinically鈥.
The defence says Dickason was a severely mentally disturbed woman in the depths of postpartum depression and did not know the act of killing the children was morally wrong at the time of their deaths.
Further, it says she was 鈥渋n such a dark place鈥 and had decided to kill herself and felt 鈥渋t was the right thing to do鈥 to 鈥渢ake the girls with her鈥.
During the Crown case, the jury heard evidence about Dickason鈥檚聽life before the alleged murders, including her gruelling fertility journey and devastating loss of a baby daughter at 18 weeks鈥 gestation聽and her family鈥檚 move to New Zealand from South Africa in the midst of the Covid-19 pandemic.
Jurors heard聽two days of evidence from Dickason鈥檚 husband, who came home from a work function to find his three children dead in their beds.
Graham and Lauren Dickason with their daughters Liane, Maya and Karla.
A video of his police interview was played, and then Graham Dickason gave lengthy evidence and faced cross-examination by the defence.
The court also heard from聽those first to the scene after Graham Dickason found his children dead聽and from people who met the Dickason family after they arrived in聽Timaru, including the girls鈥 teachers.
And Dickason鈥檚 video interview with police was also played, during which she outlined how and why she killed the girls.
The defence then called evidence from Dickason鈥檚 mother and another close family member who spoke of her mental state before she left South Africa.
Experts are now being called to give evidence about Dickason - three for the defence and two for the Crown.
Defence expert grilled by Crown about timing of interview, assessment with accused
Last week Dr Susan Hatters-Friedman - a global expert on forensic and reproductive psychiatry - gave evidence for the defence.
She explained at length to the jury all the information she had considered to come to a formal conclusion about Dickason鈥檚 mental state at the time of the killing.
She interviewed Dickason four times in May and August this year, for a total of 10 hours.
On Friday she聽gave her formal opinion on Dickason, saying the case was a clear example of an altruistic motive聽- where a parent kills 鈥渙ut of love鈥 rather than out of anger or hate.
She said Dickason was 鈥渟everely depressed and had developed psychotic thinking鈥.
鈥淚t is my opinion that at the time of her alleged offending Lauren Dickason was labouring under a disease of the mind to such an extent that it rendered her incapable of knowing that the act was morally wrong. She conceptualised that [killing the children] was the right thing to do.鈥
Crown Prosecutor Andrew McRae then began his cross-examination of the expert - which continued today.
He questioned Hatters-Friedman about the lateness of her interactions with Dickason.
He put to her that the time between the girls鈥 deaths and her speaking with DIckaosn was 鈥渁 weakness鈥 in terms of being able to get a really clear diagnosis鈥.
Hatters-Friedman agreed it would have been 鈥渙ptimal鈥 for her to have seen DIckason sooner.
However, the information she was provided together with Dickason鈥檚 police interview enabled her to use her 鈥渃linical judgement and skills鈥 to come to her conclusion.
Crown Prosecutor Andrew McRae. Photo / George Heard
Since Dickason was arrested and charged she has been detained at Hillmorton Hospital in a secure mental health unit.
McRae said the first psychiatrist to see her there had a very different view to Hatters-Friedman.
He said the doctor noted Dickason had 鈥渘o prominent psychotic features鈥 and 鈥渘o clear current indication of psychotic features.
He said there were not 鈥渘ihilistic delusions鈥 and 鈥渇elt inadequate to parent鈥 but 鈥渨as not delusional鈥 in relation to that.
鈥淚 could illicit no clearly psychotic symptoms鈥 one unusual comment鈥 there was no indication of any significant鈥 delusions.,鈥 he said.
鈥淲hile she appeared distressed at interview she did not appear to be disassociating.
鈥淣o thought disorder鈥 Focus and concentration were reasonable.鈥
On September 23 a clinical report was completed for Dickason.
In that, again, it was noted the accused was not delusional.
鈥淧resents with major depressive episode of high severity, no psychotic symptoms,鈥 it said.
鈥淎ssessment and plan - Lauren presents with severe depression, I continue to see no strong evidence of psychotic features although I remain open to this.鈥
Police at the scene of the alleged murders. Photo / George Heard
On September 28 the psychiatrist saw Dickason again.
鈥淣o indication of any disorganisation of thought鈥 or disassociated phenomena,鈥 he wrote.
On October 1 the psychiatrist noted, 鈥淟auren denied any sense of鈥 dissociative phenomena.鈥
Three days later he noted 鈥渢here remains no indication of any disassociative or psychotic phenomena.
鈥淪he continues to present with a major depressive episode without indication fo prominent psychotic features.鈥
McRae referred to a number of other clinical reports - up to more than a month after the alleged murders - where delusions or prominent psychotic symptoms were not noted.
Dickason was on 鈥渁 very low dose鈥 of antipsychotic medication at the time but the dose later increased.
Hatters-Friedman said she considered all of the clinical notes when making her assessment of the alleged murderer.
She said the notes said things like 鈥渘o clear evidence鈥 and 鈥渨ithout overt psychotic features鈥 the psychiatrist had 鈥渒ept his mind open鈥
鈥淪he certainly doesn鈥檛 present as someone who is obviously psychotic in a very clear way,鈥 Hatters-Friedman
鈥淭hat鈥檚 why it鈥檚 really important that they鈥檙e paying attention to the more subtle things.鈥
McRae said sure the doctor who saw Dickason 鈥渋n person鈥 and a number of times close to the alleged murders would be 鈥渂est placed鈥 to make the assessment.
Hatters-Friedman agreed but asserted again her belief that his mind was 鈥渙pen鈥 to Dickason being psychotic.
Further, she said 鈥渁 pair of fresh eyes is able to look at things differently鈥.
Crown questions expert鈥檚 conclusion of 鈥榩sychosis鈥
McRae put to Hatters-Friedman that if Dickason truly did hold 鈥渄elusional beliefs鈥 she would be telling others about them.
He said there was no evidence of Dickason doing that.
While it was claimed she was desperately worried about her children鈥檚 safety in New Zealand - she mentioned it to no one.
She had 鈥渁n outlet for her deepest thoughts鈥 in one friend, but said nothing to her.
鈥淪he鈥檚 not going out there and saying to the teachers鈥 what can I do to protect my child better, and expressing those (concerns) to those around her,鈥 said McRae.
鈥淵ou鈥檙e saying that these things had reached the point of being delusions - they were fixed false beliefs in her mind. If that was the case she would be out there talking to people if that was the case wouldn鈥檛 she?鈥
Hatters-Friedman said that was not necessarily true - Dickason was 鈥渁 doctor, a smart woman鈥 who was 鈥渃areful about how she comes across to other people鈥.
But McRae said the accused was 鈥渇unctioning at a high level鈥 the day she killed the children - making sure their school bags were packed and hair done 鈥渋mmaculately鈥.
She managed emails and other family admin.
That, he said, was not indicative of a woman spiralling into deep psychosis.
鈥淭o get to such a level that would mean she was not able to determine her actions were not morally correct - those delusions would need to be at a level she was absolutely preoccupied,鈥 McRae posed.
The cross-examination continues.
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