A Riley Riddle:
My prefix is humble, my suffix is prime,
My infix assisted a Russian in crime.
I know all the secrets of this little town,
And if you need me, just look around.
What am I?
The second line has nothing to do with politics.
The title of the puzzle is irrelevant to the solution.
The "prefix" word is mostly used in the UK.
Super Final Very Last Hint:
The word itself is actually very small and simple, mundane even. No higher matters are involved. Think your typical Friday night...
Super Absolutely Very Much Final and Incredibly Last Hint:
The suffIX is Roman.