There is a BBC TV comedy program called 'One foot in the grave,' which may have made it to your screen. The main character is a retired grumpy chap called Victor Meldrew who goes around saying 'I do not belieeeeeeeeeeve it' when something comedically occurs.
I had a Meldrewish moment when I saw this question.
You do not say which CICS release is being accused, but I'd be very surprised if an ended CICS job left storage around in these areas. There is always the possibility of a storage leak, but we do pay great attention to this issue, and we have not heard of any of late.
You are going to have to get proof before raising a problem.
This was first published in December 2002