CHICAGO (CBS) — A 17-year-old woman was arrested for stealing an iPhone from a passenger on the CTA Red Line over the weekend after police used the “Find My iPhone” app to track her down.

As WBBM Newsradio’s Bernie Tafoya reports, robbers are just going to have to get the message: There’s an app for that.

Whitney Martin has been charged with felony robbery and ordered held on $75,000 bail, according to Cook County Jail records.

LISTEN: WBBM Newsradio’s Bernie Tafoya reports

Police said the teenager stole an iPhone from a 42-year-old woman on a Red Line train after boarding at the Roosevelt subway station on Saturday.

The victim chased her onto the platform at the Harriston stop, then back onto another car of the same train and through the train until it stopped at Jackson. Another passenger joined the chase into the Jackson station, then up to street level into an alley at Van Buren and Federal streets.

The victim and the other CTA passenger tackled the robber and held her until police arrived.

Martin allegedly told police she didn’t take the phone, but police found it in her shirt after using the “Find My iPhone” application to track the phone, police said.

Martin was arrested. On Sunday, a judge set her bail at $75,000.

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