Canadian Politics Today

It actually is.  Parties are usually detained, not arrested, while the situation is investigated.  This is much ado about nothing.

"I have found that both [officers] acted oppressively in their dealings with Mr. Johnson and his granddaughter. The officers' actions in arresting and handcuffing the parties was undertaken without reasonable and probable grounds," wrote Brian Neal, a retired provincial court judge appointed to the case by the Office of the Police Complaint Commissioner (OPCC).