Lieutenant Junior Grade Laura E. Derr was a Starfleet officer during the Dominion War.
In 2374, a file from the starship Repulse reported Lieutenant Junior Grade Derr missing in action. Files from the USS Cochrane, Starbase 129, Starbase 153 and Wyoming reported her killed. (DS9: "In the Pale Moonlight")
Derr's name appeared on the casualty list display seen on a computer readout in that episode. It is unclear which of these was her home station.