The Tuscaloosa News has an article up where Captain Loyd Baker of the Tuscaloosa County Metro Homicide Unit is quoted. Baker states that foul play is not suspected in the death of Sherri Martel, but that she did not die of natural causes. It was also not a suicide.
A cause of death for Martel will not be determined until her autopsy and toxicology reports have been completed.
Based on what is known, Martel had gone to bed at her mother's home (where she was living recently) because she wasn't feeling well. Her husband found her unresponsive later that afternoon at her moms house.