A brother and sister from Diamond Bar were arrested on suspicion of insurance fraud this month after investigators found a video on the Internet that appears to show their high-performance sports car crashing during a street race.
Investigators say Jay Chen, 21, and his sister, Tracy Chen, 29, initially gave conflicting reports on what caused $76,000 in damage to Jay's Nissan 2009 GT-R supercar.
That made investigators suspicious, and when they searched the Internet, they found a YouTube video that appears to show the car crashing during a race up Glendora Mountain Road, according to officials from the state Insurance Commissioner's Office.
Neither of the Chens were immediately reached for comment.
Investigators say Jay first reported to his insurance company that his sister crashed the car on the 10 Freeway on March 16, 2009. They say the sister corroborated the story.
They say Jay later withdrew the claim and said he would pay for the repairs himself.
They allege Jay made another claim about

three months later, this time saying he crashed the supercar on the 60 Freeway in Riverside. Investigators became suspicious when a body shop reported that it had the damaged car in its shop since March, said Jason Kimbrough, spokesman for the Insurance Commissioner.
An investigator from the insurance company, acting on a hunch, searched for videos of the crash on the Internet and discovered the clip, Kimbrough said.
"Sure enough, the video pops up and people start putting the pieces together," Kimbrough said.
Investigators say the damage to the car is consistent with what is shown on the YouTube video.
"The YouTube video was key to building the case," Kimbrough said.
San Bernardino County prosecutors charged Jay with six counts of felony insurance fraud. His sister is charged with one count, according to court records.
Warrants were issued for their arrests last month, and both were booked on the charges March 5.
Both face prison time and fines if convicted.