The NHTSA is investigating the possibility that the crash was caused by unintended acceleration. Witnesses reported that Lagakos had been following the other drivers on the road for miles, giving proper following distance the entire time. When the Toyota sped past, the driver had both hands on the wheels and looked as if he was trying to avoid an accident.
So far, there's no indication as to whether or not the Lagakos vehicle had been serviced under Toyota's expansive recall. The 2008-2010 Highlander fell under the same January recall that brought in models like the Corolla, Venza, Matrix and Pontiac Vibe.
According to The Boston Globe, Toyota has expressed its sympathy for the families of the victims of the accident, and underscored its commitment to making all of its products safe to drive.
[Source: The Boston Globe]