(written from a Production point of view)
In the script for "The Drumhead", Dagget was a Starfleet ensign aboard the USS Enterprise-D. He was injured in an accident, with wrappings around his burns. Simon Tarses and Beverly Crusher were treating him when Worf came to speak with Crusher. Before continuing her conversation with Worf, Crusher ordered Tarses to put the readings on Dagget into his file.