Snoqualmie Pass, WA : Two people killed in eight-vehicle crash in Bellevue interstate 90 Friday, February 5 2016

The Washington State Patrol says the driver of a semi-truck has been arrested for investigation of vehicular homicide following an eight-vehicle crash that killed two people on Interstate 90.
Troopers say they believe the driver of the semi — an empty car carrier — was under the influence of drugs Friday morning when he lost control in the westbound lanes near Snoqualmie Pass, causing the chain-reaction crash.
Two people in a passenger car were killed at the scene, and five people were taken to Overlake Medical Center in Bellevue for non-life-threatening injuries.
Another tractor-trailer was also involved.
The crash was initially reported as two separate incidents, but authorities determined that they were all part of the same crash. It closed the westbound lanes for much of the day.

Source:
Patrol: Semi driver arrested in I-90 crash that killed 2