The wait-and-collect-info strategy can fail too. If they watch transactions happen, trying to trace the money of particularly promising ones, and something goe

The wait-and-collect-info strategy can fail too. If they watch transactions happen, trying to trace the money of particularly promising ones, and something goes south, they end up like the Fast and Furious ATF scandal: http://en.wikipedia.org/wiki/ATF_gunwalking_scandal http://en.wikipedia.org/wiki/ATF_gunwalking_scandal Basically, by letting it go on, they become implicated in whatever happens.