She told troopers she had been the only one in the Honda Accord, which the State Patrol said rolled at least six times about 12:20 p.m. Wednesday in the right ditch of northbound Interstate 5 in Federal Way.
Then she said she wasn't sure.
As crews tended to her broken arms and other injuries, and worked to douse the car fire in the tall sticker bushes of the ditch, they found a man they believe to be her passenger.
That was five to 10 minutes after crews arrived on scene, State Patrol spokesman Cliff Pratt said.
They performed CPR, but the man in his 30s was pronounced dead at the scene.
The fiery rollover crash happened by the exit to eastbound state Route 18.
Pratt said the State Patrol found drug paraphernalia in the vehicle, and that they were investigating the woman, who they believe to be the driver, for vehicular homicide and driving under the influence.
Both the man and woman were ejected from the car, and were not wearing seat belts, Pratt said.
He didn't yet know the city of residence for the man or woman.