There is evidence that reality TV star Bruce Jenner braked hard and tried to steer to the right just before a fatal collision earlier this month in Malibu, a law enforcement source told The Times.
The Los Angeles County Sheriff's Department continues to investigate the circumstances of the chain-reaction crash, which left a woman dead.
Officials have not said how long it will take to complete the inquiry.
Jenner, speaking through a spokesman, has denied any wrongdoing and expressed sympathy for the driver who was killed.
Still images from a bus video support accounts that Jenner actually rear-ended two cars, pushing one into oncoming traffic on Pacific Coast Highway where the driver was struck and killed, the source said.
Jenner was towing an off-road vehicle with his SUV when he struck the rear of a Lexus sedan that had slowed in front of him, authorities said. The force sent the vehicle driven by 69-year-old Kim Howe across the roadway into the path of a southbound Hummer.
But a law enforcement source, who asked not to be identified because he is not authorized to publicly discuss the case, said witnesses reported that Jenner's SUV continued on and hit a Toyota Prius that had stopped in front of the Lexus.
An initial account of the accident said the Lexus rear-ended the Prius, then Jenner rear-ended the Lexus, pushing it into oncoming traffic, where it crashed with the Hummer.
But last week an attorney for Prius driver Jessica Steindorff alleged to The Times that her car was hit by Jenner's Escalade -- and not Howe's Lexus as first described.