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These data are part of NACJD's Fast Track Release and are distributed as they there received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed except of the removal of direct identifiers. Users should refer to the accompany readme file for a brief description of the files available with this collections and consult the investigator(s) if further information is needed.

To assess the current practices in cold-case investigations, this study utilized a national online survey of law enforcement agencies (Cold Case Survey Data, n = 1,051) to document the range of ways in which cold-case work is conducted and assess how this organization affects cold-case clearance rates. In November 2008, the chiefs of police in the sample were sent a letter explaining the purpose of the survey and inviting them to participate. Potential respondents were directed to the web-based survey instrument through a provided web address. The results from the national survey were used to select sites for an analysis of case files. Researchers chose three jurisdictions that conducted a large number of cold-case homicide investigations: the District of Columbia, Baltimore, Maryland, and Dallas, Texas (Cold Case Homicide Data, n = 429). To these three sites, researchers added Denver, Colorado (Cold Case Sexual Assault Data, n = 105) because it had received a Department of Justice grant to conduct testing of DNA material in sexual assault cold cases. At all four sites, cold cases were examined for seven categories of data including victim's characteristics, crime context, motivation, human capital, physical evidence, basis for cold-case investigations and cold-case actions.

This data collection provides detailed comparative information about the structure, policies, and procedures of state-wide trial and appellate court systems for the 50 states and the District of Columbia in the United States for 2011. Information gathered includes: the number of courts and judges, judicial selection, governance of court systems (including judicial funding, administration, staffing, and procedures), jury qualifications and verdict rules, and processing and sentencing procedures of criminal cases. Data collection was carried out by the National Center for State Courts. These data are part of a related collection from the 50 states, the District of Columbia, Puerto Rico, American Samoa, Guam, Northern Mariana Islands, and U.S. Virgin Islands in the United States for the years 1980, 1987, 1993, 1998, and 2004.

In 2011, State Court Organization added new variables to the data collection process. The State Court Organization 2011 file contains the historical variables for 2011, as well as the new variables that were introduced in the 2004 collection. The new variables included data about the courts' information technology systems, including the functions of the court's IT staff, e-filing procedures, accessibility of court information through online systems, and the implementation of case management systems as a means of organizing and managing a court's caseload. The data are reported for trial and appellate courts.

The SCO Trial Court Level Data 2011 file includes a subset of the State Court Organization 2011 file, but only for trial level courts. Some variables in the State Court Organization 2011 file were recoded in the Trial Court Level Data 2011 file.