Verified on copyright.gov that no copyright renewals have been filed for the Lawton Constitution, Lawton Daily Constitution or Lawton Constitution and Morning Press. Also checked as subject and keyword, "Sandy Fife" and find no results indicating that if a copyright was ever registered, it was not renewed.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.