Reginald Williams, 23, was shot and killed on June 10, 2019, inside a Stater Bros. Market at 444 East Baseline Street in San Bernardino. According to accounts, he was in the checkout line when an argument with two other men escalated; one man produced a handgun and fired multiple shots, fatally wounding Williams. Bystanders and employees tried to stop the bleeding, but Williams was pronounced dead at the scene.

San Bernardino Police collected surveillance footage from the store and reported witnesses who saw multiple suspects flee in a vehicle. On July 3, 2019, authorities announced the arrest of a 16-year-old boy in connection with the shooting and said they were still seeking additional suspects. Williams was described by family as an aspiring entrepreneur who had bought equipment to produce a line of T-shirts and was taking real estate classes.

Anyone who was at the Stater Bros. that day or who has information about the people who fled in the vehicle is asked to come forward.