[7] According to his parents and classmates, his behaviour had started to change in the weeks before the stabbings; he began posting more frequently on Facebook, submitting "bizarre" status updates.

[12] On May 25, 2016, de Grood was found not criminally responsible for the homicides on the basis of a mental disorder (schizophrenia, per two of three expert witnesses) that caused a psychotic episode during the killings.

The NCR order means de Grood will be locked down in a psychiatric facility, and receive periodic reviews that could lead to his release under certain conditions.

[14] In September 2019, Matthew de Grood was granted unsupervised outings by the Alberta Review Board, although they say that he "remains a significant risk to the safety of the public.

"[15] In December 2023, the Alberta Criminal Code Review Board refused Matthew de Grood's request for discharge.

The board cited ongoing concerns regarding his potential risk to the public and the necessity for continued structured psychiatric care, preventing his move to a less supervised setting.

[16] Although the stabbings occurred off-campus, the close relationship between the parties involved and the University of Calgary elicited a direct response from the school's community.

"[17] On April 15, 2015, the university held the UCalgaryStrong Festival, meant both to celebrate the end of the school year and to commemorate the one-year anniversary of the stabbing.