HELSTON heroine Ingrid Loyau-Kennett was detained under the mental health act on Monday after police were concerned for her safety.
She had been questioned by officers about allegedly making abusive and racist comments to a black member of staff at Tesco in Helston.
Ms Loyau-Kennett, who is half Scottish half French, allegedly told a pharmacist that he "should not be allowed in England and should be working in Nigeria".
According to the Sunday Mirror, security guards then intervened and marched Ms Loyau-Kennett out of the building on Friday night.
Ms Loyau-Kennett was dubbed the Angel of Woolwich after she confronted the murderers of Fusilier Lee Rigby in Woolwich last summer.
She tried to reason with blood-stained killers Michael Adebolajo and Michael Adebowale before they were arrested by armed police.
She was widely praised, given bravery awards and medals and even David Cameron said she "spoke for us all" by standing up to extremism.
In Helston however, she fell out with neighbours about the building of a new children's playground next to her home in Bulwark Road.
A police spokeswoman said: "Police were called to the Bulwark estate at around lunchtime on Monday over concerns for the welfare of a woman.
"Following the incident a 49-year-old woman from Helston has been detained under the Mental Health Act to the Royal Cornwall Hospital and released into the care of the NHS."
Tesco said of last Friday's alleged racist incident: "We are aware of an incident which took place at our Helston store on Friday. Colleagues at the store are helping the police with their inquiries."
