Hmmm. From the descriptions, if they are local (within a few counties) it might be easy to track them. If they are moving elsewhere, and get lost in the crowd, and change vehicles, it could be tricky. The fate of the pipes depends on their fence. They aren't going on ebay. They'll fence them and get their ten percent, and the fence will resell 'em. The specificity of loot could help track them. Or maybe the perps will take the cash, and dumpster the pipes. Hope they make mistakes and get snagged.