Lt. Jane Doe - S2-E4
Visible crew/equipment: While Gibbs is interrogating Cluxton they are alone in the room, and when he shows her Harlan Wilson's death certificate, in the overhead shot as she begins to snap, the leg of a crew member is visible on the right side of the screen. (00:42:05)
Lt. Jane Doe - S2-E4
Visible crew/equipment: When looking round the apartment near the end, the camera crew are reflected in the TV. (00:35:50)
Lt. Jane Doe - S2-E4
Continuity mistake: At the start, the drink DiNozzo has swaps hands instantly. (00:01:50)
Lt. Jane Doe - S2-E4
Plot hole: It really doesn't make sense that they found the real killer from Jane Doe #1 assuming he also killed Jane Doe #2. They only found him because they assumed he was in prison for the last 10 years. One could explain that he must have gone to prison shortly after the first murder because he said he'd be back but wasn't, but that he was actually recently released is just pure coincidence. And without finding him they would never have suspected Officer Cluxton.
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.