She wore only pajama pants, a T-shirt and clogs on the night that the second-largest snowfall in Philadelphia history was beginning.
State Police know how she died: She was killed running across six lanes of highway traffic near Philadelphia International Airport.
But over the weekend, the mystery for State Police piled up as quickly as the snow had: Who was this woman, and why was she running across Interstate 95?
Police said last night that the unidentified woman was not running to or from a broken-down vehicle, and that they found it difficult to determine what she could have been running to or from.