Advice to people getting phone calls and visits from the Ontario Provincial Police: Sit down and write down, as soon as possible, a statement of what occurred. This should be done, independently, without any discussion amongst themselves (so that the record stays as uncontaminated as possible). They should then date that document and, no more than a few days afterward, they should e-mail it to themselves and perhaps a few others (so as to establish the time period in which it was created.)
Such a statement if prepared could end end up being very useful to a) journalists b) lawyers at some point in the future. In court, those people would be expected to testify to the fact that they’d written the document on their own, without discussing its content with others and without modifying anything afterward.