NCIS Season 1 Episode 14

Several naked corpses are found of male employees of the same US Navy base, all posthumously gagged and bounds hands on the back, shot without sexual abuse. Jethro believes the aloof method suggests a rarity: a female serial killer. Ducky, who is scorned by the female sheriff -who is more interested in Gibbs- thinks the next day's corps is a copy-cat's work, so the investigation follows both theories, finding interesting paths of doubt inspired by the victims' personal past and improbable coincidental links trough the base...