The Family History Library has very few newspapers from Louisiana. The New Orleans Public Library has the most complete collection of newspapers in the state and an obituary index to several newspapers. The 550,000 cards in the index cover the years 1804 to 1811, 1814 to 1815, 1860 to 1866, and 1876 to 1972.
Two helpful published sources are:
Mayers, Brenda L., and Gloria L. Kerns. Death Notices from Louisiana Newspapers, 1811-1919 vols. 1-6. Baker, Louisiana.: Folk Finders, 1984. (FHL film 1697312 item 3, vols. 1-5; fiche 6087223, vol. 6.)
Newspaper Files in Louisiana State University Library. Baton Rouge, Louisiana: Louisiana State University, 1961. (FHL book 976.318 B3L; fiche 6051322.)