Effects of "United States vs. Leon" on Police Search Warrant Practices, 1984-1985 (ICPSR 9348)

Published: Jan 12, 2006

Principal Investigator(s):
Craig D. Uchida; Timothy S. Bynum


Version V1

This data collection examines the impact of the Supreme Court decision in "UNITED STATES VS. LEON" on police search warrant applications in seven jurisdictions. For this collection, which is one of the few data collections currently available for the study of warrant activities, data were gathered from search warrant applications filed during a three-month period before the Leon decision and three months after it. Each warrant application can be tracked through the criminal justice system to its disposition. The file contains variables on the contents of the warrant such as rank of applicant, specific area of search, offense type, material sought, basis of evidence, status of informants, and reference to good faith. Additional variables concern the results of the warrant application and include items such as materials seized, arrest made, cases charged by prosecutor, type of attorney, whether a motion to suppress the warrant was filed, outcomes of motions, appeal status, and number of arrestees.

Uchida, Craig D., and Bynum, Timothy S. Effects of “United States vs. Leon” on Police Search Warrant Practices, 1984-1985. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2006-01-12. https://doi.org/10.3886/ICPSR09348.v1

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United States Department of Justice. Office of Justice Programs. National Institute of Justice (85-IJ-CX-0015)


All search warrants filed in the United States in 1984 and 1985.

search warrants applications

event-transaction data



2006-01-12 All files were removed from dataset 8 and flagged as study-level files, so that they will accompany all downloads.


  • The public-use data files in this collection are available for access by the general public. Access does not require affiliation with an ICPSR member institution.

  • The citation of this study may have changed due to the new version control system that has been implemented.
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This dataset is maintained and distributed by the National Archive of Criminal Justice Data (NACJD), the criminal justice archive within ICPSR. NACJD is primarily sponsored by three agencies within the U.S. Department of Justice: the Bureau of Justice Statistics, the National Institute of Justice, and the Office of Juvenile Justice and Delinquency Prevention.