Why is Sarah, Mississippi so murdery?

Sarah is not much of a town, and the facts are candid about it: an unincorporated community in Tate County in north-western Mississippi, administered as part of a larger division rather than by a government of its own, with a population of 2,775, a post office on Sarah Road, a zip code of 38665 and an elevation of 187 feet. It sits 183 miles from Jackson and about 57 miles south of Memphis, Tennessee, far enough out to feel like its own place and close enough that the city is a straight run up the road. Tate County is dry.

The seven murders arrive in only two episodes, and the count is split almost evenly. Episode 1, set in Sarah itself and dated to April 2001, carries four victims. Episode 548 reaches 24 miles to Horseshoe Lake in Arkansas, a summer lake for Memphis families, and adds three.

So rank 193 overall, second in Mississippi, rests on two episodes and two towns, one of them the show's very first. It counts the show's cases, not the county's crime rate; the show picks the towns.