barbara beam died in the home she shared with her sister and nephew in greenville , south carolina in january .
a coroner ruled that she died from homicide by neglect and prosecutors are now deciding whether to charge her family members .
her sister told officers that she had not been moved from her bedroom chair for six months , and beam had sores over her legs .
when paramedics removed her from the chair and put her body on the ground , her legs stayed bent in a sitting position , police said .