When it starts likely has little to do with that tweet. I don't know that there's been enough information to vet that tweet as reliable. Toronto, like Vancouver has a history of false leads just prior to the start of filming, for various reasons, and the best thing to do if you come across raw tweets or FB mentions like this is to relay it Peach or one of the detectives. There are ways to test these things, and in the interest of avoiding dead ends and false leads, it's best to let the detectives know and let them make the judgments.