Prosecutors have said their break-up in February 2012 was a catalyst to the shooting five months later.
She was Holmes' first romantic relationship, District Attorney George Brauchler said, but she told Holmes that she didn't see a future for them.
Locked up: James Holmes, who killed 12 people and injured 70 others in shooting in Aurora, Colorado in July 2012 took eerie selfies in the hours before the massacre.
A judge ruled these can be used prosecutors Scene: Prosecutors are also permitted to use evidence found on his computer, which was found during a search of his apartment (above).
In brief questioning before court adjourned, Gargi Datta said she met Holmes in 2011 at the graduate school they attended outside Denver.'I'm not quite sure what the term person of interest means,' Mr Oates told CBS News.'This was a person who had contact with the suspect, a casual acquaintance.Ritchie Duong told the Los Angeles Times that he has known Holmes for more than a decade and they also both attended undergraduate school at the University of California, Riverside, where they saw each other once a week to watch the television series Lost.James Holmes, who allegedly shot and killed 12 people in an Aurora, Colorado movie theatre, lived an introverted lifestyle prior to his murderous rampage.