On November 26, 2018, 35-year-old Renee Luiz-Antonio of Milton-Freewater, Oregon, was shot and killed while operating a tractor at the Umapine Creamery, a dairy west of Umapine. Deputies from the Umatilla County Sheriff’s Office responded to a 6:30 a.m. report and found Luiz-Antonio deceased. Security camera footage and scene evidence indicated he was shot while on the tractor.

Investigators quickly focused on a coworker, 52-year-old Antonio Vasquez-Vargas, also known as Deciderio Vargas-Ortiz, after the creamery owner said an ongoing dispute between the two had culminated in the shooting. Vasquez-Vargas, located and arrested the next day at the Clover Island Inn in Kennewick, Washington, was charged with murder and felon in possession of a firearm; he had a prior 1999 vehicular homicide conviction and a history of deportations. The case later involved mental health evaluations and a plea resolution.