Here in the River City megalopolis (pop. 1,000,000) the dragnet went on for seven days, not one day. Police acted upon 500 warrants and made 140 arrests. They discovered that 119 fugitives had died or were in prison somewhere.

Doesn't sound like trouble to me - sounds like co-operation and intelligent law enforcement. Computers were a great help.

500 warrants divided by 1,000,000 population. Doesn't sound like "mass" anything to me.