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Dublin woman Lynn McDonald told the filmmakers that Cookes, who was born in Gloucestershire, England, had developed a bond of trust with her daughter Ellie after they met in 2016.

Lynn's younger daughter, Daisy, was born in 2013 with Rett syndrome, a rare genetic disorder that affects brain development, resulting in severe mental and physical disability.

Cookes, now 36, later fled, leaving Lynn worried "she would come back in the middle of the night and take my child".

Lynn first met Cookes, who she knew as Lucy Fitzwilliams, in 2016.

In her guise as a child therapist, Cookes came twice a week to give Ellie, Lynn's older daughter, one-on-one time.