The father and stepmother of former NASCAR and IndyCar racer Robby Gordon were found dead in Southern California in an apparent murder-suicide.

According to CBS Los Angeles, the bodies were found in their home on Wednesday after a 911 call, and afterward Gordon expressed his utter shock and sadness.

"I'm so sad I can't believe it," Gordon told reporters. "I'd like everybody to understand that this is very, very tough. It's not only tough for me, but for my sister Robin, Beccy, and my sister which is Sharon's daughter, Haley."

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Robby Gordon at the Sylvania 300 at New Hampshire Motor Speedway in 2011. Getty Images

The Orange County coroner's office identified the deceased as Robert Gordon, 68, and Sharon Gordon, 57.

Robby Gordon made a name for himself by driving both the NASCAR and IndyCar circuits and, most famously, becoming one of only four people to drive both the Indy 500 and NASCAR's Coca-Cola 600 in Charlotte on the same day.

He currently races in an off-road series he created in 2013 called Speed Energy Formula Off-Road. His father, known as "Baja Bob" was also an off-road racer.