On Jan. 2, 2012, a psychotic Andrew Roelink killed his mother.

But court records show there were warning signs more than a year before Hilda Roelink was murdered in her King Township home.

According to the agreed statement of facts read in court on Wednesday, "Starting in 2010, Andrew appeared to his family members to have developed significant problems with anger and addiction to marijuana."

In late 2010, Roelink’s parents, Hilda and William, took action. They sent Roelink to the family doctor and Addiction Services for York Region.

In January 2011, Roelink met with his family doctor, Michael Dawson, who noted, "Disturbingly he has also had delusions...around channelling his inner powers...around becoming a mixed martial arts fighter...but paranoid ideation around strangers...restaurants etc."

Roelink met with Addiction Services and a social worker a couple times, court heard, but then never again.

“By all accounts, when Andrew attempted to stop using marijuana, his behaviour worsened,” the agreed statement of facts reads. “William Roelink reported that when Andrew tried to stop he became ‘very angry and agitated.’ (Roelink’s brother) reported that his brother had ‘more symptoms’ and was agitated and paranoid when he abstained from using marijuana.”

By April, Roelink was back to using marijuana on a regular basis, court heard.

In the months leading up to the murder, the Roelink family was “walking on pins and needles,” court heard, as Roelink often became “angry and violent and upset with them for seemingly no reason at all.”

Two days before the murder, on New Year’s Eve, Hilda Roelink called 911 explaining that her son had locked her out of the home and had been acting strangely, hinting at suicide and posting nonsensical comments online.

Roelink was arrested under the Mental Health Act and taken to Southlake Hospital in Newmarket. Dr. Stephen Stokl described Roelink’s condition as “a psychosis not otherwise specified, which may have been influenced by cannabis.”

Roelink was held overnight, given some medication and released the next morning.

Then, on the morning of Jan. 2, hours before he killed his mother, Roelink called 911, acting strangely. He hung up on the operator several times and would not let his mother take the phone. Police arrived, questioned the family, looked around the home and left. Roelink’s parents had assured police everything was fine and apologized “for wasting their time,” court heard.

Roelink again called 911 at 7:36 p.m., explaining that his mother was acting “nutty.” For the next several minutes, the line was shared between the 911 operator, Roelink and his mother. Hilda Roelink warned that when police arrived, Roelink would act like everything was fine, but that in fact, she was “scared.”

Before the end of the call, Roelink grabbed a kitchen knife and stabbed his mother in the neck. He is heard uttering the word “demon” around the time of the murder. Court heard that he then went upstairs and told his father, “You better come down…you have to stick with me now, our powers are together.”

A series of nonsensical notes, many of which claimed “Evil doesn’t exist” and “The devil doesn’t exist,” were found in the home after the murder.

Two doctors testified in court on Tuesday.

Dr. Treena Wilkie said Roelink’s “most likely diagnosis” was a psychotic disorder within the schizophrenia spectrum. While Wilkie did not believe his psychosis was directly linked to his marijuana use, she said, “marijuana use can precipitate more overt symptoms of psychosis.”

Dr. Karen De Freitas disagreed. She believed that Roelink suffered from “cannabis-induced psychotic disorder,” though he likely had an underlying mental illness that was brought out by his heavy marijuana use.

Both doctors agreed that Roelink was psychotic when he killed his mother. He thought she was a demon, they both testified, and killed her to protect himself.

After he was found not criminally responsible for his mother’s murder on Tuesday, he was transferred to a psychiatric hospital. The Ontario Review Board will assess his case within the next couple months. From there, it will be decided whether he requires more treatment and for how long, or if he can safely be released to the public.