Rachel Harvey, of Large & Gibson Solicitors in Southsea, was nicked during a police ‘crackdown’ on July 7 in aid of The Elizabeth Foundation.
Two officers put Rachel, 48, in cuffs at Portsmouth Business Expo before taking her to the cells at Gunwharf Quays.
She said: ‘The police were fantastic, they really got involved and made it quite real.
‘I nearly ran away when the officer put on a pair of rubber gloves!’
The four ‘prisoners’ who took part raised £3,061.10 for The Elizabeth Foundation, a Portsmouth centre supporting deaf preschool children and their parents.
Fiona Heath, fundraising manager for the foundation, said: ‘We could not have done it without the help of Hampshire Constabulary, and the officers who gave up their spare time.
‘We hope to do it again but hopefully over a weekend.’