Alison Matilda Ramsay, 59, was called Alison Firth and working in a care home when she gave an 84-year-old frail resident a lethal dose of sedative.
Newcastle Crown Court heard in 2001 that during her 16-year working career she held at least 27 jobs, falsified references and made up elaborate lies including a claim she had been raped.
She had been cautioned for obtaining property by deception in 1997 and after police started investigating the death of the bedridden woman with senile dementia, faked a series of attacks on her own home to draw suspicion away from her.
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