"Police Stop, Handcuff Every Adult at Intersection in Search for Bank Robber."

ABC News reports:

Police said they had received what they called a “reliable” tip that the culprit in an armed robbery at a Wells Fargo bank committed earlier was stopped at the red light.

“We didn’t have a description, didn’t know race or gender or anything, so a split-second decision was made to stop all the cars at that intersection, and search for the armed robber,” Aurora police Officer Frank Fania told ABC News.

Officers barricaded the area, halting 19 cars.

The search went on for about 2 hours, and when they got to the last car, they found was a person they arrested for the crime. 

It's very odd that they would have the tip in that form, with absolutely no detail other than the person was stopped at a particular red light. And the evidence found — according to the article — was 2 loaded firearms.