Reprieve, a charity which seeks to enforce human rights for prisoners, has said that Mrs Sandiford was targeted by drug traffickers.
"Lindsay was targeted by drug traffickers, who exploited her vulnerability and made threats against her children.
Following her arrest, she was interrogated by the Indonesian police without a translator, legal representation or the assistance of the British Embassy for 10 days."
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The 60-year-old takes charge of the Black Cats with immediate effect.
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The operation took around three hours to complete, with the remains being disposed of by a specialist animal by-product company.