Certain party or parties unknown

My hometown might become a happening place: for a couple of nites, it sponsored a set of edgy art installations across two blocks, confronting the history of lynching in the county and the role citizens had in that violence.
The project is called "Certain Party or Parties Unknown", a reference to the late 19th Century newspapers that refused to name the killers. The projections included newspaper headlines, archival photos, videos, sketches, paintings, and performance art that were meant to challenge the viewer. (On its website, the organizers warn that the exhibit contains “sensitive material that may awe, illuminate, challenge, unsettle, confound, provoke, and, at times, upset visitors.”)