Visible crew/equipment: At the very start, when the NCIS agent stops at the mail box, there is a reflection of someone moving once he has stopped. There is no-one else in the area, meaning it's one of the crew. (00:00:05)
Visible crew/equipment: During the exterior scenes in Arizona, with Sheriff Boyd, Gibbs, and Tony, in some shots either a hidden lavalier microphone or transmitter is visible. One example, when Dina fires her weapon Gibbs dismounts his horse, and his hidden transmitter is briefly seen at his back. Another example, while Dina tells Gibbs and Tony that her doctor ran blood tests, Sheriff Boyd's mic is visible under his shirt by the buttons, and so on. (00:35:30)
Visible crew/equipment: When Gibbs informs Dina Risi of Patterson's death, it then cuts to Dina as she tells them she mixes her own pigments, and in the next shot facing Dina, the wheel base of filming equipment is visible on the right side of the screen (non-existent in overhead long shots). (00:36:05)
Chosen answer: It is never stated, however she must have been there several years if she is on presidential detail.