A father accused of the horrific murders of his wife and two young sons in a quiet seaside community had reportedly undergone a significant personality shift following a traumatic brain injury, the Daily Mail has learned.

Family and friends of 38-year-old Christopher Duong noted that after a high-speed crash in 2022, his demeanor and mood drastically changed, leading to increasing paranoia.

Tragically, just a year later, Duong took the lives of his wife, 35-year-old Janet Nguyen, and their sons, Alexander and Harlan, before ending his own life at her parents’ spacious home in Prince Rupert, British Columbia, according to an inquest.

The bodies of the family were discovered on June 13, 2023. Heartbreakingly, four-year-old Alexander and two-year-old Harlan were found with teddy bears at their feet, lying in bed with their parents.

The inquest revealed that the young boys died from asphyxiation, while Duong is believed to have strangled his wife using an electrical cord.

While evidence from the scene suggests Nguyen might have been involved, friends insist to the Daily Mail that the devoted mother would never have harmed her children.

A local man who worked with Duong in Prince Rupert’s lucrative crab fishing industry said the crash marked a dramatic turning point in the family’s fortunes.

He recalled seeing Duong months later and barely recognizing him. ‘He didn’t have the same look on his face. Not the usual smile. No joking around. None of that was there,’ he said, speaking on condition that his name was not used.

The bodies of Christopher Duong, Janet Nguyen, and their two sons were found in the same bed in their Prince Rupert, British Columbia home on June 13, 2023

Nguyen regularly shared pictures with her husband and their boys which projected an image of familial bliss

Duong was reputedly a member of violent drug gangs in Prince Rupert, a port city of just 12,000 people, and that did not change after he became a married family man.

The fisherman said Duong had always lived recklessly, but the crash appeared to alter his judgment and emotional control.

What troubled him most, he said, was Duong’s growing instability around his young children.

He recalled seeing Facebook posts from Nguyen expressing pride and joy in her sons, calling them her world.

The Facebook posts now haunt him. He believes warning signs were missed and that authorities failed to act before it was too late.

‘He was a bad person. He dealt drugs and ruined people’s lives,’ he said.

‘Most people think he got what he deserved. But those kids didn’t.’

The inquest heard that Duong’s paranoia escalated sharply in the weeks leading up to the murder-suicide.

Days before the deaths, police stopped him driving around Prince Rupert at about 2am with his family in the car. Duong told officers they were being targeted for a ‘hit’ and would be killed if they stopped.

Officers detained him under the Mental Health Act. Nguyen and the children were taken home.

Police recovered a video described as the couple’s ‘last will and testament,’ outlining guardianship plans and their wishes for their property

An afficial testified at the coroner’s inquest that wife and mother, Janet Nguyen, may have been ‘a willing participant’ in the tragedy 

Duong was assessed by a doctor and released just hours later. No external threat was ever confirmed.

Yet the paranoia continued. Rumors circulated that Duong believed he was entangled with organized drug gangs involved in the area’s opioids and methamphetamine network.

None of his fears were substantiated, but friends said his belief in them was absolute.

In the days before the killings, Duong and Nguyen recorded a video on a phone described as a ‘last will and testament,’ in which they discussed guardianship for their children and final wishes for their property.

The video raised troubling questions about what Nguyen understood, feared, or was trying to manage.

Royal Canadian Mounted Police Corporal Matthew Blumberg testified at the inquest that evidence at the scene suggested Nguyen was a ‘willing participant’ in events leading up to her death.

That suggestion has enraged those who knew her. A woman who had been close to Nguyen since her childhood described her as a devoted and fiercely protective mother.

‘The suggestion that Janet was a willing participant is infuriating,’ said the woman, also speaking on condition of anonymity.

According to the woman, Nguyen was increasingly frightened of Duong as his mental health deteriorated.

She said Nguyen actively sought help in the days before the killings, reaching out to friends and family, trying to arrange alternative care for her children.

Investigators testified that there was no evidence of outside involvement and concluded the deaths involved only the four family members found int the family home, pictured

The absence of defensive wounds on Nguyen’s body has been used by some to suggest compliance or incapacity.

‘Not even a possibility. She would never, ever have hurt her children,’ said the woman.

She accused police, doctors, and social services of catastrophic errors, noting that Duong had been detained under mental health provisions, only to be released within hours.

Social services acknowledged delays in contacting the family in the critical three-day window between Duong’s release and the killings.

Psychiatrist Dr Barbara Kane told the inquest that British Columbia lacks adequate psychiatric hospital resources and that likely contributed to Duong being released despite clear warning signs.

She called for increased psychiatric staffing and resources in emergency rooms across the province.

Testimony painted a picture of a system stretched thin, making dangerous decisions under pressure. The tragedy has forced uncomfortable questions about how Canada handles mental health crises.

The contrast between the family’s online presence and their final days was stark.

Social media accounts showed a smiling family of four. Vacation photos depicted Duong and Nguyen beaming beside their sons.

The children looked happy, secure, and deeply loved. Friends said the couple appeared attentive, affectionate, and devoted parents.

Police testified that the children were believed to have been drugged prior to their deaths, based on cold medication found at the scene and toxicology results

Nothing in those images hinted at the paranoia and fear that would soon engulf them.

One friend told the Daily Mail they believed the family was now ‘happily together in heaven.’ Another said they were ‘great people’ who were sorely missed.

Duong’s sister, Farrah, issued a brief statement describing the loss as ‘incredibly personal and painful’. She told the Daily Mail the family was choosing to grieve privately.

The coroner’s inquest, which does not assign criminal blame, concluded the deaths were a murder-suicide. Its purpose is to establish facts and identify ways to prevent similar tragedies.

For those who knew Nguyen, the greatest injustice remains the suggestion that she shared responsibility.

They believe she died trying to protect her children from a man who had become dangerously unwell, and that the real failure lies with the systems that saw the warning signs and still let the family fall through the cracks.