Officials identify woman killed in I-5 crash caused by suspected drunken teen

A woman was killed early Thursday after an 18-year-old suspected drunken driver slammed into a guardrail on Interstate 5 near the Pierce-King County Line.

The Pierce County Medical Examiner’s Office identified the victim as Cindy Thach, 20, of Tacoma.

Three others were injured in the crash, which occurred about 2:20 a.m. in the southbound lanes near milepost 139.

Troopers said an 18-year-old Lakewood woman was traveling south in a 2009 Chevrolet Cobalt when she lost control and struck a guardrail.

The driver of a 2017 Toyota Tundra then hit the Chevy, which had stopped in the middle of a lane.

Thach was a passenger in the 18-year-old’s vehicle.

A 26-year-old woman also in that car and taken to Tacoma General Hospital with minor injuries.

Two men in the Toyota were also injured. One was treated at the scene, the other was taken to an area hospital.

The 18-year-old woman who caused the crash was not injured.

She was arrested on suspicion of DUI and vehicular homicide.

The wreckage and ensuing investigation blocked all I-5 lanes for about four hours. Traffic was able to get through by 6:45 a.m.

Stacia Glenn covers crime and breaking news in Pierce County. She started with The News Tribune in 2010. Before that, she spent six years writing about crime in Southern California for another newspaper.