From The Truth About Guns:

According to the Tulsa Police Department (TPD), the homeowner and 47-year-old Marco Richardson had been involved in an ongoing argument that had already led to previous confrontations. Police say that on the night of the incident, Richardson, his son and three others exited two vehicles at the suspect’s house and rushed him.

While the five men had the homeowner, who has not been identified, pinned against a vehicle in the yard and were assaulting him, he drew his gun and began shooting, hitting Richardson in the chest and also hitting another of his attackers.