Authorities say a van carrying seven family members was rear-ended by an SUV driven by a man suspected of driving under the influence.
Griselda Fernandez, the daughter of Raudel Fernandez-Avila, said Monday that her father and mother were both killed along with her two uncles and a step-cousin.
She says her mother, Belen Fernandez, didn't want to go, but the family convinced her.
A Nevada judge ordered 18-year-old Jean Ervin Soriano held at $3.5 million bail at a court hearing.
An arrest report says he told the arresting Nevada Highway Patrol trooper he had too many beers.
Soriano, his passenger and two other people were injured.
Soriano, a former California resident, now lives in Utah.