The fundraiser for the funeral is pledging any extra funds to be donated to a women's shelter. If Jasmine and Aliyah spent time in a shelter for domestic abuse after living with the PS, this information would definitely be helpful toward building a case of first-degree murder. Investigators will continue compiling evidence right up until the trial. This will go to a federal court, Queen's Bench, because of the gravity of the charges. This qualifies as "only the most serious" criminal offences, I'd say.
https://albertacourts.ca/qb/areas-of-law/criminal
It will be excluded from any possibility of Mental Health Court, even if he does plead NCR eventually. Murder and domestic abuse do not qualify.
https://www.albertacourts.ca/pc/areas-of-law/criminal/mental-health-court
It is possible that the PS made previous threats to harm them. It is possible that Jasmine called a hotline or confided in someone. It is possible that the PS shot his mouth off in a bar or at work. All theoretical at this point.
******** started, charges still pending in double homicide