Not sure how you can look at that second link and conclude it has a "substantial" amount of violent crime. The overall crime rate, and the violent crime rate, are both rated at "A-" levels, which is on the good end of the scale, not the bad end.

I mean, ffs, this is from the link:

"By a simple count ignoring population, more crimes occur in the northwest parts of East Killingly, CT: about 0 per year. The north part of East Killingly has fewer cases of violent crime with only 0 in a typical year."