The gunfight happened in the early morning hours of 17 August 2018. The location was 867 Bootlegger Lane in Yoakum, Texas. Yoakum is a small town in Texas, about halfway between San Antonio and Houston.

There was “bad blood” between Dakota Wayne Kirkman, 19, and Manuel Martinez III, 36. The men lived about 22 miles apart. Yoakum is in DeWitt County, Texas. Kirkman and his girlfriend lived in Hallettsville in Lavaca County, Texas.
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Dakota did not want his live-in girlfriend to hang around Martinez and his wife. His girlfriend, Martinez, and Martinez' wife were at Martinez' house when Kirkman came to bring his girlfriend home. Kirkman arrived in his truck. He had a singleshot .22 rifle and one cartridge, loaded in the chamber.

Kirkman and Martinez got into a verbal altercation. The Sheriff reported that alcohol was involved.

The altercation escalated into a gunfight. Cartridge cases found at the scene indicated that Martinez fired 15 shots from an AR15 type rifle and 12 shots from a .40 caliber pistol.

Most of the action seems to have happened while Kirkman was in or around his truck. 13 bullet holes were found in the truck. 11 of the bullet holes were from .223 cartridges. Two of the bullet holes were from a .40 caliber pistol.
Kirkman is recorded as firing one shot from his single shot .22 caliber rifle. The shot struck Martinez in the chest, killing him.

https://www.ammoland.com/2018/10/self-defense-in-texas-22-single-shot-beats-ar15-and-40-cal/#axzz5WH9MMi4L