121 Ill. 2d 401 - People v. Thompkins’s Empirical Analysis
1988
Citation profile
3 federal appellate · 241 state decisions
How this case has been cited
Cited by 257 later decisions — most recently February 2026 · most notably 185 Ill. 2d 81 - People v. Kliner (1998), 141 Ill. 2d 40 - People v. Smith (1990)
3 federal appellate · 241 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 Strickland v. Washington · Miranda v. State of Arizona Vignera · Johnson v. Zerbst · United States v. Wade · Brinegar 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 257 citing decisions cite the case generally; a passage count includes only decisions quoting that exact language verbatim.
““ 1 [W]here an indictment contains several counts arising out of a single transaction, and a general verdict is returned the effect is that the defendant is guilty as charged in each count, and if the punishment imposed is one which is authorized to be inflicted for the offense charged, the verdict must be sustained.’ (People v. Lymore (1962), 25 Ill. 2d 305, 308 .)””
3 later decisions quote this exact passage · from the majority“"Rule 412 is silent as to those persons whose possession and control of material and information must be imputed to the State. [Citation.] Illinois courts have held that the officers and personnel of the Chicago Police Department Crime Laboratory are investigative personnel within the meaning of Rule 412(f). [Citation.] The State's failure to disclose to the defense [pertinent materials] cannot be excused by the argument that the assistant State's Attorneys were unaware of the [material's] existence, since both they and the police are required to cooperate and ensure that all relevant information will be provided and that discovery will be accomplished." People v. Thompkins, 121 Ill.2d 401, 425-26 , 117 Ill.Dec. 927 , 521 N.E.2d 38, 48 (1988).”
2 later decisions quote this exact passage · from the majority“the defendant must demonstrate that counsel's performance was objectively unreasonable under prevailing professional norms and that there is a `reasonable probability that, but for counsel's unprofessional errors, the result of the proceeding would have been different.'”
2 later decisions quote this exact passage · from the majoritye.g. People v. Irvine · People v. Givens
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.