Cumbria's Police Crime Commissioner Richard Rhodes has apologised for spending £700 of public money on a chauffeur-driven Mercedes, but denies influencing the investigation into the suspected whistleblowers.
Cumbria Police raided a property and arrested a third alleged "whistleblower" on Thursday over leaked expenses following the arrest and suspension of two police workers last week.
"It would be completely inappropriate for me to try to find out what was going on or influence that process.
"At no point have I endeavoured to influence the investigation that the Chief Constable and his colleagues are undertaking.
"The PCC has no business in that sort of activity."Nobody, nobody will accuse me of exceeding my brief."
More top news
A cat has found his way home three weeks after accidentally being taken to the tip by a neighbour.
The abusive pasts of more than 1,300 violent partners have been disclosed under a scheme introduced less than a year ago, new figures show.
Monday proves a brighter, colder day than Sunday. One or two showers pushing in and turning wintry over the hills inland