Before her autopsy revealed a heart attack, it was thought that Mama Cass died from choking on a ham sandwich, as she was lying on the couch with food on the table when she was found dead.
Sebelum autopsi yang mengungkapkan serangan jantung, diperkirakan Mama Cass meninggal karena tersedak roti lapis ham, saat dia berbaring di sofa dengan makanan di atas meja saat dia ditemukan tewas.