They have 80 thousand CCTV cameras in moscow.
Who can possibly control and monitor them?
That's what happened:
The company which is responsible for servicing the cameras did find a way to make better profit.
They did feed not the live pictures from the cameras itself in to the system but some recorded pictures so they didn't have to actually do the service.
This all started in Mai and they where discovered in September. ;-)
You can find the whole story here