Its not listed anywhere what she was arrested for the other day
So, before we can link this current arrest or police attendance to Caroline's past story we need to know what this current arrest/attendance was for.
For all we know - this current arrest might be completely unrelated. It might have been a shoplifting offence that day, it might have been for drink driving offence or leaving the scene of a car crash. I'm guessing, because I don't know - I wasn't there - none of us were there, so none of us know.
We don't know - we just don't know!
And because we don't know what the arrest was for - how can we judge if the police attendance was necessary.
If you can say for some certainty that the recent arrest/attendance was defiantly linked to her past story - then we have a point we can start from
But at this minute we don't know - we just don't know!
The only people who will know are: Caroline, the reporting person, the OIC and any direct witnesses.
Unless you know something different - but it appears not.