Sam was still working out how the alert system in the bunker ticked, but he knew that every so often they did pop up when there was something out of the ordinary. This time it was triggered by police reports of various thefts. He pored over the reports and the items taken to try to figure out the significance. It took awhile of searching before he was able to turn up a spell that needed all of those items. Unfortunately, a little more digging online revealed that one of the pawnshops in the City had recently received an item that hadn't been stolen yet.
Maybe the thefts were random and this was all just a coincidence, but Sam didn't believe in coincidences. Not anymore. Maybe not since he'd found out about what his dad really did while dragging them all across the country. Whatever the case, he thought this was worth looking into.
Which was why he pulled down the street that currently held the pawnshop and parked his car somewhere that he hoped was inconspicuous to wait and see if the pawn shop thieves would show up soon.
He had at least a brief moment where he thought that he should have called Dean, but this could be nothing. It was little more than a hunch, really. If it turned out to be something, he'd call his brother and bring him in.