I'm starting to notice that these mass shooting incidences in America cluster in the more conservative areas. Particularly the midwest, south, and the interior parts of the east coast.
When there are lots of sexually repressed conservatives, strict attitudes towards sex, strong enforcement against prostitution, and easy access to guns. This kinda stuff happens.
In the west coast of America, sure prostitution is illegal but the attitudes are much more lax and enforcement not as strong. You could find lots of street walker whores in Seattle, Portland, LA, SF, Oakland etc...
If Americans were smart they would legalize prostitution nationwide asap to lower the rates of these mass shootings.