Perhaps you're misunderstanding the story here? The search did find them easily. The problem, the police claim, is that the search produced 2,689,000 records. Before being published, each record has to be reviewed, as it might have sensitive information about people other than Mr. Peckels that should not be released. (They asked for all "communications, correspondence, and logs", to be clear, so many of these records are going to be random freetext emails rather than structured reports which might be more easily analyzed.)