Just curious really as I had to give a police statement today about a crime I had witnessed but the investigating officer had my previous address details from when I reported a different crime a few years ago. I wasn't asked for a statement then (presumably they didn't find the person responsible). Previous to this I was a witness in a court case that led to a conviction but that was a different police force entirely. So now I'm musing, can anyone tell me what information is actually available to an initial investigating officer (seemingly not up to date address info!) and how confidential are previous statements that are not related to the crime in hand?