New Orleans Sniper

On January 7, 1973, shots were fired from Howard Johnson''s Motel in New Orleans, LA. Six were killed, ten wounded. After the first sniper was killed, the search continued for others. A thorough police investigation, however, concluded that there had been only one -- whose body was found on the motel roof. How did the idea of multiple snipers emerge? How was it decided that there had been only one...