Khamtoune Silimanotham, 59, was one of seven people killed in a mass shooting on September 7, 2020, at a remote property on Highway 371 in Aguanga, California. The site was being used as an illegal marijuana grow and contained over 1,000 pounds of processed marijuana and several hundred plants. Deputies found six people dead at the scene and one woman alive who later died at a hospital; all seven victims were Laotian immigrants, five women and two men, who had been working at the grow site.

Riverside County investigators have described the operation as very organized. No suspects were identified immediately and the case went cold, but detectives continued to follow leads. In December 2024 new clues reportedly pointed to a targeted attack involving Laotian gang members from the San Diego area, and a mid-size dark-colored SUV was identified as one of the vehicles used in the shooting. The incident has been classified as a home invasion robbery, although nothing was reported stolen from the property.