Just copy and paste the above URL. Enter name of Theodore Evers, select death and enter 1971. You can view digitized copy of original certificate and make a copy of you want. You will have to enter a User Name and Password. Use something you can easily remember if you think you'll be using it again. Items on Family Search site are Free, they just have to be careful and protect information.
TX Dth Idx thru 1976:
Name: Theodora Roosevelt Evers Death Date: 26 Jul 1971 Death Place: Atlanta, Cass, Texas Gender: Male Race: Death Age: 61 years Estimated Birth Date: 1910 Birth Date: Birthplace: Marital Status: Spouse's Name: Father's Name: John Henry Evers Father's Birthplace: Mother's Name: Viola Smith Mother's Birthplace: Occupation: Place of Residence: Cemetery: Burial Place: Burial Date: Additional Relatives: Film Number: 2223289 Digital Film Number: 4169327 Image Number: 1799 Reference Number: 46492
If you don't have any results in getting an obit, you might try public library. If they don't have back issues of the local newspaper they should know who would. Due to cause of his death there should be article in the news section of the paper, also.
Go to Find a Grave site -- http://www.findagrave.com/http://www.findagrave.com/-- Click on Search Grave Records, enter Theodore Evers, select state of Texas, select county of Cass. You can view his headstone and will find someone has entered information on him and his family. You might want to contact her.