The victim, an NROTC Midshipman, had highly classified files on his laptop that could compromise national security if leaked.
NCIS: Season 20, Episode 9 | Cast and Crew - Rotten Tomatoes NCIS.S20E09.720p.HDTV.x264-SYNCOPY.mkv.mp4
The team eventually uncovers a plot involving a Russian spy, Viktoria Valkov (posing as Evelyn Shaw), who was Delilah's teaching assistant. The victim, an NROTC Midshipman, had highly classified