Such a search usually works by "please provide us with all relevant documents and copies of data" and only to a small degree by officers opening cabinets and ta

Such a search usually works by "please provide us with all relevant documents and copies of data" and only to a small degree by officers opening cabinets and taking whatever they find. If the confiscated documents show that large parts are missing or manipulated the charges for not complying with rules on record keeping and the negative impression on the main case are typically worse for the organization than the harm by those bad documents. For individuals who might be responsible the interests might be different - they won't like documents referring to them specifically. And also mind: The authorities are also required to evaluate documents in benefit of the defendant, thus to some degree there is self-interest to share stuff for that reason.