Between 12-1-77 and 2-28-78 in Chicago, over 80 inches of snow fell, yet there were over 800 murders that year. Can't seem to find out how many were in the first quarter, but that would be interesting to find out, since so many are blaming the weather. If there were more than 60 or 70, I wouldn't be quite so quick to lay this good news on weather alone.
Sure it has. Been going down in Michigan rather steadily ever since shall issue, and shall issue has been steadily improving every year. Wayne county, for example, now boasts probably a quarter of the time needed to get your CPL, as opposed to inception.