Legal action against Essex Police has been threatened by the disgraced former leader of Essex County Council Lord Hanningfield over his "unlawful arrest".
In September, he was held at home for connection with cash claims made while he was in charge at County Hall, which followed his early release from jail after nine weeks for parliamentary expenses fraud related to his work as a Conservative peer of the realm.
The lawyers of the accused sought £3,000 for unlawful arrest and detention and £1,500 for trespass in relation to the latest investigation in a "letter before claim" to Essex Police.
In July, on the charges of falsely claiming £14,000 while he was a Conservative peer in the House of Lords, Lord Hanningfield, whose real name is Paul White, was jailed for nine months.
The former pig farmer, from West Hanningfield, had claimed expenses for overnight stays in London when he was not in the capital.
His arrest from home was deemed unlawful by his lawyers because officers entered his home without a search warrant.
It is stated in the letter before claim that the reasons given for the arrest were unclear and also seeks compensation costs of £2,000.
Until January 18, Lord Hanningfield remains on police bail.