Killing Floor by Lee Child

This is the first in an 11 book series. Jack Reacher is an ex-military policeman who seems to find trouble wherever he goes and is always in the right position to help an innocent victim. On impulse Jack stops in Margrave, Georgia, he is eating breakfast in the local dinner when the city cops come in and arrest him for murder. His alibi holds and he is released but then the identity of the vicitim is known and the murder becomes personal for Jack.