Commonwealth v. Cook’s Empirical Analysis
1999
Citation profile
172 state decisions
How this case has been cited
Cited by 172 later decisions — most recently November 2025 · most notably Commonwealth v. Rogers (2004), Commonwealth v. Chase (2008)
172 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 Terry v. Ohio · Commonwealth v. Hicks · Commonwealth v. Duncan · Office of Disciplinary Counsel v. Zehner · Commonwealth v. Matos
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 172 citing decisions cite the case generally; a passage count includes only decisions quoting that exact language verbatim.
“[B]ased on the facts surrounding the instant case, including the police officers’ training, expertise and past drug arrests in the same area; the attempted exchange of an unidentified object in a high crime area, appellant’s nervous behavior when the police made a U-turn; and appellant’s flight, the police officers were able to point to specific and articu-lable facts, which in light of their police training and expertise, supported a finding of reasonable suspicion.”
1 later decision quote this exact passage · from the dissent“Both the Fourth Amendment of the United States Constitution[,] and Article 1 Section 8 of the Pennsylvania Constitution [,] protect citizens from unreasonable, searches and seizures.”
1 later decision quote this exact passage · from the dissent
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.