“… a new breed of killer appeared …”
Youtube has the whole film in parts at 
Here is another interesting episode, the case of Mark Essex:
“… three black snipers set fire to this hotel in dowtown New Orleans …”
The Killing of America (1982) is an American documentary film tracing the origins of gratuitous violence in the United States. Directed by Sheldon Renan and narrated by Chuck Riley, the film was written by Leonard Schrader and his wife Chieko Schrader, with music by W. Michael Lewis and Mark Lindsay.