Is it possible that the picture on FB led someone to "tip off" the police, who in turn began looking into the matter and (legally) discovered that there had bee

Is it possible that the picture on FB led someone to "tip off" the police, who in turn began looking into the matter and (legally) discovered that there had been some searches for pressure cookers and backpacks and then continued to look into the matter by paying them a very civil police visit? The police look into leads all the time and a lot of them turn out to be people totally unrelated to the matter, or people that have actually done no wrong. But the police can't tell the future. They don't know ahead of time which tip is legit and which one is a dead end. They go down a few dead ends before finding the right one. Wouldn't it be nice if every thing was solved on the very first lead or inquiry.