RC123 said "I got the impression from the 3 people I know that are affected that they didn’t know anything. "
In the Brandon Sun article, it says that the school division was informed at 11 a.m., and at 2:30 p.m. an employee of the company called police "asking for advice on the situation" (they were told it was a civil matter), presumably because they were locked out of the job site?
So I'm thinking your 3 people are correct, it was business as usual right up until the end.