SERIES PREMIERE: This new nonfiction series, launching with a six-episode re-examination of a 19-year-old murder case from Louisiana, obviously owes its existence to such popular recent series as the podcast Serial and HBO’s Jinx: The Life and Deaths of Robert Durst, and arrives right on the heels of Netflix’s headline-grabbing Making a Murderer. What may make this new Discovery series stand out, in the long run, is its storytelling: Its executive producers are Barry Levinson and Tom Fontana, who first collaborated on NBC’s fictional but fascinating Homicide: Life on the Street.