Modifications to source documents usually emanate out of an analyst's need to gather data which is standardized. usable. of good quality and in a format that facilitates the collection process. If current report forms and source documents do not meet these criteria, new ones should be developed. Newly created documents should contain data specific enough to allow formulation of conclusions as to the existence or emergence of criminal activity and to the identification of possible! suspects. while allowing pertinent data to be easily extracted.