S6·E24 Semper Fidelis

Episode recap

Task: Write a 280-380 word episode recap for NCIS S6E24 (Semper Fidelis).
Constraints:
Use ONLY verifiable facts from the provided SYNOPSIS and SOURCES.
No invented/guessed titles, names, dates, counts, awards, ratings, numbers, or plot points.
If a detail is missing, omit it.
Style: Original, neutral, encyclopedic prose, plain text.
No markdown, no asterisks, no headings, no bullet points.
Length: 280-380 words.
Synopsis: After a security breach at the SecNav's residence leads to the death of an ICE agent, Gibbs and the team are forced to work with ICE and the FBI to find his killer.
Sources:
[1] TMDB: NCIS (2003), TV-14, Crime, Drama, Action & Adventure.
[2] IMDb: Created by Donald P. Bellisario, Don McGill. Cast includes Sean Murray, David McCallum, Mark Harmon, Brian Dietzen. Follows Major Case Response Team investigating cases connected to US Navy and Marines Corps.
[3] TMDB Season 1 Cast: Mark Harmon (Leroy Jethro Gibbs), Michael Weatherly (Tony DiNozzo), Sasha Alexander (Caitlin Todd).
[4] Wikipedia: Title history (Navy NCIS -> Naval Criminal Investigative Service -> NCIS).
[5] Moviefone: Stars Mark Harmon (Leroy Jethro Gibbs), Sean Murray (Timothy McGee), Michael Weatherly (Tony DiNozzo/Anthony DiNozzo). Premiered on CBS in 2003.
Episode Title: Semper Fidelis (from prompt).
Episode Number: S6E24 (from prompt).
Plot: Security breach at SecNav's residence -> death of an ICE agent -> Gibbs and team work with ICE and FBI to find the killer.
Characters/Team: Gibbs (Leroy Jethro Gibbs), the team (implied members from sources: Timothy McGee, Tony DiNozzo).
Context: NCIS follows the Major Case Response Team investigating criminal cases connected to the US Navy and Marines Corps personnel and their families.
The synopsis is extremely brief: "After a security breach at the SecNav's residence leads to the death of an ICE agent, Gibbs and the team are forced to work with ICE and the FBI to find his killer."
The prompt asks for 280-380 words.
Problem: The provided synopsis is only about 35 words. The sources provide general series info but no additional plot details for this specific episode.
Constraint Check: "If the synopsis is sparse, stay