I do understand main stream UK culture is not familar with hunting or need for protection from wildlife and tends to be very anti guns but I image the Candian population including authorities may want to explore at what point do you step in with guns in house and mental health issues.
Reading this is does look like questions are being asked about guns and mental health support.
https://www.bbc.co.uk/news/articles/ce8w95knp55o
Police said they had attended the suspect's family home on multiple occasions over the past several years, with some calls related to mental health concerns.
...
Van Rootselaar was known to police, and "we've begun the process of reaching out to" the public health care system to "understand what interactions may have taken place," British Columbia Premier David Eby told a news conference outside the Tumbler Ridge town hall late on Wednesday evening.
The suspect previously had a valid gun licence that had since lapsed, McDonald said.
Police said Van Rootselaar had dropped out of Tumbler Ridge Secondary School four years ago.