Last week, Snohomish County sheriff's detectives arrested Anthony E. Garver, 25, in connection with the killing. He's being held without bail.
Garver told police that he and Evans-Lopez spent time with another young woman in the days before the killing.
The woman is described as about 18 to 22 with blond hair. She may have been wearing a sports jersey. She may have been seen in a red GMC sport utility vehicle.
Evans-Lopez was stabbed to death. She was 20.
Anyone with information should call 425-388-3845.
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