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
Former Liverpool and Newcastle defender Jose Enrique has revealed he has had surgery to remove a rare brain tumour and is now in recovery.
The mother-of-two said she was told by RSPCA investigators they were looking at the possibility that poison-laced sausages were involved.
The Beatle made several stops during his trip through Liverpool with James Corden and shocked many Scousers along the way.