Elizabeth Trent was a member of IPX.
In 2261, she arrived at Babylon 5, despite the ban on travel to Babylon 5, to study the Thirdspace artifact.
The artifact, like it did to everyone else, soon began to influence her. Possibly due to her desire to be recognized and rewarded for discovering its secrets, she began to make number of unfounded assumptions about what the artifact was and what it could do. Trent theorized that Thirdspace could be a dimension that would be much faster than even Hyperspace, allowing for almost instantaneous travel between destinations. When her coworker began to question all this, she shot him in the back. She even tried to attack Ivanova when she found out what she did. After the crisis was over, she left the station supposedly feeling guilty about what happened. [1]