This is an interesting story on how intelligence agencies created an anonymous phone and got many criminal gangs worldwide to use it through unsuspecting middlemen.
Stories like this are cheering. However, it made me wonder about how agencies decides when enough information has been collected. On one side, the involved police and politicians want recognition, leading to promotions, morale and funding. They need to take actions. Cooperating with many others might be tenuous. On the other side, keeping things going allows more information to be collected. One wonders why they acknowledged they created the device rather than claiming it was infiltrated, rinsing and repeating, doing the same thing again.