16-Year-Old Killed, Driver Arrested in Shelton, WA Rollover Crash
A 16-year-old boy was killed and three other teenagers were injured early Tuesday, September 8, 2026, when the vehicle they were riding in rolled over on SE Arcadia Road near Shelton, Washington. According to the Mason County Sheriff’s Office, the vehicle carrying five teens struck a deer in the roadway and did not slow down before rolling into a ditch. The victim, identified by the county coroner’s office as Liam Swanson, died at the scene. The 18-year-old driver was arrested and allegedly faces one count of vehicular homicide and three counts of vehicular assault, with formal charges still pending.
KIRO 7 News Seattle reported that speed and alcohol are believed to be major contributing factors in the crash, according to investigators. A witness told the outlet the vehicle “just wasn’t attempting to brake or slow down” before the collision. The Mason County Sheriff’s Office said the vehicle sustained catastrophic damage in the rollover. The investigation remains active, and no road closure details have been released.
Teen killed, driver arrested after crash in Mason County
Where It Happened
SE Arcadia Road near Shelton, Mason County, Washington
What the Law Says
Washington’s vehicular homicide statute, RCW 46.61.520, makes it a felony to cause a death while driving under the influence, recklessly, or with ordinary negligence. In cases involving alleged alcohol use and excessive speed, like this one, prosecutors often pursue the DUI or reckless-driving prong, which carries the most serious penalties under Washington law. A conviction can bring years of prison time and license revocation.
RCW 46.61.522 defines vehicular assault as causing substantial bodily harm to another person while driving under the influence, recklessly, or with disregard for the safety of others. When a crash injures multiple occupants, as authorities say happened here, prosecutors can file a separate vehicular assault count for each injured victim. It is a class B felony in Washington.
This summary is general information, not legal advice. Every case depends on its specific facts.
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