A 92-year-old great-great-grandmother was arrested by police at her own request because she "wanted to know what it was like to be naughty".
Josie Birds, from north Manchester, requested to be taken into custody by officers as she said she had been good all her life.
The experience was organised by a family friend and two off-duty officers came to her house on Saturday afternoon.
Her granddaughter Pam Smith said: "They accused her of robbing a Co-op and her response was, 'I don't do my shopping in Co-op'.
"They put her in handcuffs and took her to the police station in the back of the van, where they 'questioned' her rigorously.