[brityank]

So the driver turned left in front of fast oncoming traffic; obviously not smart.

Somebody blew through a traffic light:

According to Harold Schapelhouman, chief of the Menlo Park Fire Protection District, the car was struck by a green late-model Infiniti, with Halberstam's side bearing most of the impact, as Jones was attempting to make a left-hand turn at the intersection of Bayfront Expressway and Willow Road. No other passengers were in the Camry, which hit a third car after the initial impact.

From your links.

[SF Republican]

Thanks, I did not see where someone ran a red light.