It might be an investigation into speeding, but it is proceeding at a snail's pace.
Prosecutors have asked police to obtain more evidence over allegations Energy Secretary Chris Huhne dodged a speeding penalty. The CPS said it had requested additional material after completing a "full review" of the case.
Police began investigating five months ago after claims Mr Huhne asked his ex-wife, Vicky Pryce, to accept penalty points on his behalf. The force delivered an initial evidence file to the CPS in July, but has since been pursuing other leads.
The speeding offence is alleged to have taken place in 2003 when the then-MEP was driving home from Stansted Airport after flying back from the European Parliament. Mr Huhne, who left Ms Pryce for another woman last year, denies the allegations. The CPS said: "We hope to reach a decision shortly."