Lansing’s police chief says the string of attacks along a greenway raises the possibility that a serial killer has been at work. A man is under arrest in one of the deaths.

© Matthew Dae Smith/Lansing State Journal, Reuters

The film, “The Assassin(s),” revisits a 1974 shooting that has spawned J.F.K.-style conspiracy theories, exposing divides over the country’s history.

© Ullstein Bild, via Getty Images