Deputy District Attorney Lauren Guber, who prosecuted the case, said in the late evening of Nov. 7, 2014, Rios was driving under the influence of alcohol when he attempted to enter the 10 Freeway and crashed into another vehicle near the Rosemead exit.

Investigators believe that Jung and Sohn left a local Beverly Hills restaurant in separate cars just prior to the fatal collision. Jung and Sohn are believed to be the drivers of the two vehicles that ultimately struck and killed the victim. Alcohol is believed to have been a factor in the cause of the fatal collision. Additionally, Sohn is currently on probation with Orange County Superior Court due to prior convictions for driving under the influence.