Oregon State Police are trying to determine what led to a deadly head-on crash just east of Stayton.
It happened Friday afternoon on Highway 22.
Troopers said a van driven by 38-year-old Jana Kuest, of Hillsboro, crossed the center line into oncoming traffic before hitting an SUV.
Life Flight took Kuest to Salem Hospital where doctors pronounced her dead.
A 9-year-old passenger in the van was seriously hurt and flown to Emanuel Hospital.
Kuest's 10-year-old son, along with the driver and passenger in the SUV, suffered non-life threatening injuries.
Troopers said it's possible Kuest suffered a medical emergency just before the crash.
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