A 25-year-old U.S. Marine from Garden Grove was killed Wednesday when he crashed his car on the 57 Freeway.

The Orange County Coroner draped an American Flag over the body of Robert Telles after the 11 a.m. crash.

Telles' family confirmed that he was based at Camp Pendleton.

His family was in mourning, saying he was a mentor to children at the Boys and Girls Club.

The California Highway Patrol said he was traveling northbound on the 57 Freeway in a Honda when he suddenly lost control and swerved across three lanes.

He crashed into the concrete railing on the shoulder, and the car flipped onto its roof, killing Telles.

It wasn't clear what led Telles to swerve.

His cousin told NBC4 his family was everything to him, and he had big dreams.

The Telles' family also said the tragedy hit them even harder as Robert's brother died playing football several years ago.

The family set up a GoFundMe account to help with funeral expenses.