NCIS Season 1 Episode 13

The team finds the shooting of USMC recruiter Gunnery Sergeant Freddie Alvarez, who lied to potential recruits to make them sign up, yet got many thanks too, was the work of a crack sharpshooter, according to Abby's ballistics from a far building where he removed exactly one brick for a perfect trajectory. Yet the only complaint with threat from such a good shooter he recruited, Sergeant Aaron Barnes, now an instructor who signed up again, has an alibi. After another recruiter is shot, staff sergeant Allen, and white feathers are found as a calling card, Gibbs poses as recruiter, his profile theory being a rejected would-be marine who visits his victims before killing them...