#witnesser__witness__informant  someone who sees an event and reports what happened
  supertype:  #perceiver  #speaker
  subtype:  #attester__attestant  someone who affirms or vouches for the correctness or truth or genuineness of something
  subtype:  #testifier__deponent  a person who testifies or gives a deposition

No statement uses or specializes #witnesser; click here to add one.