Former nurse Dorothy Byrd , 98 , died of a morphine overdose in February . Mrs Byrd 's daughter visited her mother on the day before she was taken ill. An initial post mortem was inconclusive but further tests found evidence . The coroner said that while it is not known how long Ms Byrd's life had been prolonged, there were no obvious signs of foul play and an autopsy report concluded that death by natural causes could be The Cook County Medical Examiner 's office found evidence of homicide .
Former nurse Dorothy Byrd , 98 , died of a morphine overdose in February . Mrs Byrd 's daughter visited her mother on the day before she was taken ill. An initial post mortem was inconclusive but further tests found evidence . A nurse and two healthcare assistants have been suspended by the home . The Cook County Medical Examiner 's office found evidence of homicide .