Fortunately he is listed in the Arkansas Death Index, which means you will probably be able to order a death certificate. It costs $10.00.
Go to this website and you can download the application form. It only takes about a week for them to return it to you. Make sure you mark that it is for genealogy purposes since you are not a direct descendent
Unfortunately he is not listed in the Saline County Arkansas Obituaries and Death Notices 1823-1930. (Published by Eddie Landreth) which contains every newspaper that was printed (the ones that are still available on microfilm) in Saline county up to 1930