Two friends who were riding in the car with him were ejected from the vehicle upon impact. Both victims were pronounced dead at the scene. Victim Jacquelyn Ardalan, 19, was riding in the front passenger seat and victim Miles Andrew Christensen, 19, was riding in the rear right seat of the car.
Berggren was transported to the hospital and treated for a non life-threatening skull fracture. At the time of the crash, he had a blood alcohol level of .10 percent.
The victims' family members were in court Friday. Ardalan's mother, Alice Ardalan, told the court that her daughter's death was preventable and that her life has been destroyed and forever changed by the loss of Jacquelyn.
Christensen's father, Eric Christensen, explained that he had a strong, loving relationship with his son, but "overlying this is the solitude of judgment I feel as a parent."
"I find little satisfaction in anything I may have done right as a parent and find there is no emotional balm that can sooth the pain of my failures as a father. I know that things we tend to work out with time with our adult children will never be granted to me. I now live with the feeling that there is no redemption in this mortal life for the failures I had in raising my son," Christensen continued.
Berggren pleaded guilty to two felony counts of gross vehicular manslaughter while intoxicated with a sentencing enhancement for causing great bodily injury.
Berggren faces a maximum sentence of 13 years in state prison at his sentencing on Aug. 20.