Let's Give Kobold Peace a Chance

From the introduction: In the village of Greyrun an uneasy truce is negotiated between the citizens and a band of kobolds living in nearby caves. When the mayor is found dead, kobolds are rounded up and accused of the crime. Unless the player characters intervene, vigilante justice will be carried out, and the fragile truce will break into an all-out war. A 2-4 hour adventure for 3rd-5th level characters.