Post-Mapp studies found mixed evidence on whether illegal searches actually declined.

Evidence

Does the Exclusionary Rule Deter Police Misconduct? Ifthe exclusionary rule has a deterrent effect, then one would expect illegal police searches to decline after Mapp. In a few jurisdictions, researchers did find a decrease in the number of defense motions to suppress illegally seized evidence, which might signal a decline in illegal searches. In several jurisdictions after Mapp, however, One might attribute this increase to the failure of the exclusionary rule to deter police ONS But the increase How Does the Exclusionary Rule Affect Convictions? — G. Alan Tarr, Judicial Process and Judicial…, 1857

Categorization

• XREF: Ties to Mapp v. Ohio, the incorporation decision extending the exclusionary rule to the states. — connects to: Publication bias skews the research record on prosecution disparities; Contradictory siting studies differed mainly over geographic unit and comparison scope — Luke W. Cole and Sheila R. Foster, From the Ground Up: Environmental…, 300
• QUESTION: The paragraph trails off mid-sentence in this OCR source; confirm what several jurisdictions actually showed.

Broader Connections

• Publication bias skews the research record on prosecution disparities #expands (0.90)
• Contradictory siting studies differed mainly over geographic unit and comparison scope #complicates (0.85) — Luke W. Cole and Sheila R. Foster, From the Ground Up, 300