Police use iPhone app to track Red Line thief chased down by victim and witness

A woman (That's a woman?) was held in lieu of $75,000 bail charged with stealing an iPhone from a woman on a Red Line train Saturday afternoon in the Loop.
The 42-year-old victim had gotten onto a northbound Red Line Train at the Roosevelt subway station but only made it one stop before Whitney L. Martin grabbed the iPhone from her hand about 2:55 p.m and exited the train.
The victim chased her off the train but when Martin got back on the same train and ran through other cars, a man saw what was going on and joined the pursuit.
They exited at the Jackson station and the two followed Martin south on State Street, west on Jackson and then south through an alley to Van Buren and Federal, where they tackled her, detaining her until police got there.
Martin told police she did not take the phone, but officers found it nearby in a red shirt belonging to her after using its “find my iPhone’’ application.
Martin, 17, of the 6700 block of South Eberhart Avenue, was arrested and charged with felony theft.
She was booked into Cook County Jail Sunday after a judge set her bail at $75,000.