Fresh Clues in Tragic California Bus Crash

Witnesses say truck may have already been on fire before crash.
2:17 | 04/13/14

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Transcript for Fresh Clues in Tragic California Bus Crash
But trainers are being told keep your distance. An important new clue into that horrible crash on the highway in California, there it is, the FedEx truck slamming into a bus filled with students, was the truck already on fire before it jumped the median and hit that bus? ABC's bazi kanani has the latest. Reporter: The investigation is still a long way from complete. But ntsb investigators are releasing what they know so far. This morning, we're hearing from the only driver that survived this crash. He wasn't slowing down. He was moving fast. Reporter: The shaken survivor saw flames beneath the truck as it careened toward her and her husband. I think we looked at each other and both of us said -- Their account of the crash one piece of the puzzle for the investigators who have working at the crash scene for days now. Extremely difficult due to fire damage. Reporter: The investigators revealing the first detailed account of the accident, initial reports indicate that the FedEx truck was in the right-hand lane going southbound attempting to change lanes, witnesses say it lost control. The driver of the bus hit the brakes skidding towards 145 feet and swerving at the last moment. The FedEx left no such skid mark. More than 40 high school seniors were on the bugs at the time. Lucky is an understatement. I don't have a word to describe how I feel. Reporter: And as you might expect when you see those images of the charred wreckage, lot of evidence was destroyed. Investigators believe they'll be able to get toxicology report bianna. Another reminder of how important those safety belts are for students. A much lighter story, prince William dropping a big hint that

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