The NTSB Chair who is heading the 214 investigation and the official NTSB spokes person, has no expertise regarding aircraft, aviation, or investigations.
She's acting as a spokesperson, and I thought she did an excellent job of managing the Sunday press conference - giving the media technical information plus layperson-type explanation without dumbing it down or sounding patronising. She repeated each press inquiry for the benefit of others, summing up the question concisely and being clear what the parameters of her answer were. I'm planning to copy her technique next time I'm in front of a crowd!