The suspect left the couple, but threatened she would return to kill the woman.
She came back a short time later armed with large knives and stabbed the woman multiple times.
The victim was rushed to the Hospital of the University of Pennsylvania where she died a short time later of her injuries.
The suspect fled but dropped her ID on the street.
Police tracked her down using the identification and arrested her.
A weapon was recovered nearby on Alden Street.
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