Law enforcement recordkeeping practices are critical tools in effective operations and management. From the earliest days of organized policing, officers have written incident reports that capture details regarding crimes, victims, offenders, suspects, locations, and the nature of injuries and losses. Incident reports provide the foundation for ongoing investigations and prosecutions, and supplemental reports (e.g., victim and witness statements, investigative notes, and evidence inventories) often contribute to the incident’s case file.¹ In addition to individual incident reports and case files, police agencies have also maintained police registers or blotters, which typically provide summary details of reported incidents throughout their jurisdictions. Available to the press and the public, the police blotter provides a chronological record of incidents and police activities within a jurisdiction.