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81 J. Crim. L. & Criminology 1034 (1990-1991)
Search Warrants, Motions to Suppress and Lost Cases: The Effects of the Exclusionary Rule in Seven Jurisdictions

handle is hein.journals/jclc81 and id is 1044 raw text is: 0091-4169/91/8104-1034
THEJOURNA. OF CRIMINAL LAW & CRIMINOLOGY                    Vol. 81, No. 4
Copyright © 1991 by Northwestern University, School of Law  Printed in U.S.A.
SEARCH WARRANTS, MOTIONS TO
SUPPRESS AND LOST CASES: THE
EFFECTS OF THE EXCLUSIONARY RULE
IN SEVEN JURISDICTIONS*
CRAIG D. UCHIDA** AND TIMOTHY S. BYNUM***
I. INTRODUCTION
Empirical studies that examine the effects of the exclusionary
rule on search warrant cases are few and far between. Only a hand-
ful of researchers have studied the use of search warrants by law
enforcement officers, and even fewer have looked systematically at
the effects of the exclusionary sanction on their use.
Search warrants have become an important tool in law enforce-
ment efforts to curtail illegal drug trafficking. During the late 1980s,
a number of police agencies have increased their use of warrants.
For example, Minneapolis narcotics detectives executed 123 war-
rants in 1987, 383 in 1988 and 425 in 1989. In San Diego, crack
abatement detectives executed 143 warrants in 1989, compared to
67 in the previous year. In Denver, a crack task force of sixteen
detectives executed 246 search warrants in 1988 and 350 in 1989.1
However, little is known about the results of these warrants gener-
ally, in terms of arrests, prosecutions, motions to suppress, or lost
cases due to the exclusionary sanction.
Questions about the effectiveness and necessity of the exclu-
* Prepared under Grant No. 85-IJ-CX-0015 from the National Institute of Justice
(NIJ) to the Police Executive Research Forum (PERF). The opinions expressed herein
are the authors' and not necessarily those of NIJ, Michigan State University, or PERF.
The assistance of Dennis Rogan and Michael Wilson is gratefully acknowledged. We
also thank three anonymous reviewers who helped to clarify issues, focus our thinking,
and make this a better paper. Of course, any errors are ours, and ours alone.
** Ph.D., State University of New York at Albany, 1982; M.A., State University of New
York at Albany, 1979; B.A., University of California at San Diego, 1976.
*** Professor, School of Criminal Justice, Michigan State University, East Lansing;
Ph.D., Florida State University, 1977; M.S., Florida State University, 1974; A.B., David-
son College, 1970.
I Private memoranda from the Minneapolis Police Department, San Diego Police
Department, and Denver Police Department, on file at the offices of theJournal of Crimi-
nal Law and Criminology.

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