'This is a very difficult time for the Barona family and our thoughts and prayers go out to the families of this unimaginable tragedy….
The Barona Gaming Commission released this statement Wednesday: Roberts told three secretaries to leave when he first entered the office then shot Casillas and himself to death. Sheriff's deputies say gunman Donnell Roberts killed Raymundo Casillas on Tuesday behind the Barona Resort and Casino near San Diego. (AP) - Authorities have identified a 43-year-old manager killed at a gaming commission office by a former employee in San Diego County.