Ghislaine Maxwell, an associate of Jeffrey Epstein, was tracked down by police using data from her mobile phone.
According to the
, the 59-year-old was located using global-positioning-system (GPS) data from a phone that had made calls to her lawyer, sister and husband.
American authorities obtained a warrant to grant access to GPS and historic location data on Maxwell's phone, registered under the name "G Max".
The FBI then obtained a further warrant to use a "stingray" device to send and receive signals from nearby phones.
This controversial method has been criticised as it can be used to gather information from the phones of innocent.
Maxwell has twice been denied bail on charges of procuring underage girls for Jeffrey Epstein between the years 1994 and 1997.
She has pleaded not guilty to charges of trafficking minors, and her trial is due to begin in July of this year.
A number of allegations are made against Maxwell in the popular Netflix documentary Jeffrey Epstein: Filthy Rich.
