Nathan Shamblin was an 18-year-old from Upland, California who was fatally shot during a baby shower on April 13, 2019. The celebration, held in a residential neighborhood, ran late into the night when a group arrived and an argument escalated into a physical confrontation that ended in gunfire. Shamblin and another person tried to flee in a car, but Shamblin died and was pronounced dead when police arrived. Three other young men, all in their twenties, were wounded in the shooting.

Four people were arrested in the days after the incident: Julian Garcia, Priscila Villeda, Sonia Ellison, and Lisa Vasquez. Garcia was charged with murder and attempted murder; Villeda, Ellison, and Vasquez were charged as accessories to murder, and Villeda also faced a charge of being a felon in possession of a firearm. The Upland Police Department continued to seek information from the public as the investigation proceeded.

If anyone attended that baby shower or has information about the arrival of the group that sparked the altercation, please come forward to help clarify what happened.