I think it's amazing, given the feds' apparent belief that the system was used to transmit illegal money only, they shut it down instead of just working with the owners to record all the transactions. Seems to me, this would have delivered some pretty easy law enforcement home runs for (almost) free.
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
Basically, by letting it go on, they become implicated in whatever happens.
If LR operated as described in the indictment, it didn't really have information about its customers, so those records might not have been all that useful.
