67 Ill. 2d 308 - People v. Campbell’s Empirical Analysis
1977
Citation profile
11 federal appellate · 56 state decisions
How this case has been cited
Cited by 76 later decisions — most recently February 2026 · most notably Horton ex rel. Horton v. Goose Creek Independent School District (1982), State v. Dukes (1988)
11 federal appellate · 56 state decisions
Later decisions citing this case, by decade. The current decade is in progress, and our corpus holds fewer opinions from the most recent years, so the latest bars are undercounted — not a real decline.
Relationships
Relies on Katz v. United States · Mapp v. Ohio · Chimel v. California · Chambers v. Maroney · Johnson v. United States
Most-quoted passages
The sentences later courts lift from this opinion, ranked by how many decisions quote each — the parts of the opinion doing the work. These counts are smaller than the citation total above because most of the 76 citing decisions cite the case generally; a passage count includes only decisions quoting that exact language verbatim.
“[T]he use of trained dogs to detect the odor of marijuana poses no threat of harassment, intimidation or even inconvenience to the innocent citizen. Nothing of an innocent but private nature and nothing of an incriminating nature other than the narcotics being sought can be discovered through the dog’s reaction to the odor of the narcotics.”
2 later decisions quote this exact passage · from the majority
How this case has been treated — in progress
Whether each later court followed, distinguished, criticized, or overruled this decision. The treatment classification (task #35) runs highest-cited cases first and lights up here as it reaches this one.