Lil Jose

Investigators were mystified Wednesday as to why an 11-year-old boy was behind the wheel when the car ran a stop sign and crashed into another vehicle, killing him, his mother and younger sister.

California Highway Patrol Officer Stefanie Buck said investigators have not yet been able to interview the car's lone survivor to determine why sixth-grader Jose Manuel Silva Covarrubias was driving.

"For whatever reason the 11-year-old didn't stop at the stop sign, and drove the Honda into the path of the Ford," Buck said. "It's a tragedy any way you look at it."

Felipe Zamora Gonzalez, the man's brother, said the family was returning from Jose's soccer team practice, and added that he had never seen Jose drive before.