Hopefully not so many that they stop becoming news. Slim comfort at best, but at least (as I've said elsewhere and often) crimes like this are recognised as such and dealt with accordingly.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'