Continuity mistake: We are often shown the same NCIS form used for searches. However the form is constantly changing design. Even in the same episode on some occasions.
Lost & Found - S5-E9
Character mistake: We see McGee using his computer where the word violators is spelled violaters on the NCIS search form. (00:23:15)
Lost & Found - S5-E9
Continuity mistake: LT Col Mann is retiring after 22 years' service. However last season she stated that she was coming up on 20 years' service. (00:12:00)
Lost & Found - S5-E9
Visible crew/equipment: When Gibbs and McGee are talking to the kid at the start there is a camera shot moving past an empty chair. In this shot a shadow can be seen moving over the chair. (00:04:00)
Continuity mistake: When Maddie turns the photo album round, its position changes between shots. In the first shot she is holding it by the top of the album, as shown with a brown photo being away from her hands. Camera changes and now she is holding it by the bottom of the album and her hand is on the brown photo. (00:09:40)
Continuity mistake: We see Jenny talking to the former embassy worker. When doing so she has her hands out stretched in one shot and clasped in others. (00:25:30)
Revealing mistake: When Ducky opens the fridge and uncovers the body, the man's eyes twitch. (00:21:20)
Revealing mistake: In a close up of the iPod there is 1 song on the play list, playing at the 29 second mark. However, the icon to indicate that the iPod is on repeat is missing. Therefore, the iPod has only been playing for 29 seconds, despite the fact the crew left a good time before the team arrived. (00:07:20)
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.