Continuity mistake: When McGee finds out about the poison ivy, he is holding the bat in 1 hand. Camera cuts and he is holding it in 2 hands. (00:16:20)
Continuity mistake: Just after seeing Ducky, McGee is talking to Abby. He pulls a face due to his current situation, the camera cuts, and his facial expression is completely different. (00:26:50)
Continuity mistake: When the SGT is in the interrogation room, as Gibbs sits down, the SGT's hands are on the table. Camera cuts to Gibbs sitting down, but look behind him at the mirror and the Sargent's hands are not on the table in the reflection. (00:33:20)
Continuity mistake: When Mrs. Moore is in the interrogation room, her hands are flat on the table then clenched instantly. (00:34:00)
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.