United States v. Fanfan
E649384
United States v. Fanfan is a U.S. Supreme Court case decided alongside United States v. Booker that helped reshape federal sentencing by limiting mandatory guideline enhancements based on judicial fact-finding.
All labels observed (4)
| Label | Occurrences |
|---|---|
| U.S. v. Fanfan | 1 |
| United States v. Ducan Fanfan | 1 |
| United States v. Ducan Fanfan (Booker companion case) | 1 |
| United States v. Fanfan canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7193348 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: United States v. Fanfan Context triple: [United States v. Booker, relatedCase, United States v. Fanfan]
-
A.
United States v. Eichman
United States v. Eichman is a 1990 U.S. Supreme Court case that struck down a federal law banning flag desecration as unconstitutional under the First Amendment’s protection of free speech.
-
B.
United States v. Giordano
United States v. Giordano is a U.S. Supreme Court case that clarified the strict procedural requirements for federal wiretap authorizations and limited who may approve such surveillance orders.
-
C.
United States v. Classic
United States v. Classic is a 1941 U.S. Supreme Court decision that expanded federal authority over primary elections by holding that Congress can regulate primaries when they are an integral part of the electoral process for federal offices.
-
D.
United States v. Stanley
United States v. Stanley is a U.S. Supreme Court decision that formed part of the Civil Rights Cases, in which the Court limited federal power to prohibit racial discrimination by private individuals and businesses.
-
E.
United States v. Gratiot
United States v. Gratiot is an 1840 U.S. Supreme Court case that upheld broad federal authority over public lands under the Constitution’s Property Clause.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: United States v. Fanfan Target entity description: United States v. Fanfan is a U.S. Supreme Court case decided alongside United States v. Booker that helped reshape federal sentencing by limiting mandatory guideline enhancements based on judicial fact-finding.
-
A.
United States v. Eichman
United States v. Eichman is a 1990 U.S. Supreme Court case that struck down a federal law banning flag desecration as unconstitutional under the First Amendment’s protection of free speech.
-
B.
United States v. Giordano
United States v. Giordano is a U.S. Supreme Court case that clarified the strict procedural requirements for federal wiretap authorizations and limited who may approve such surveillance orders.
-
C.
United States v. Classic
United States v. Classic is a 1941 U.S. Supreme Court decision that expanded federal authority over primary elections by holding that Congress can regulate primaries when they are an integral part of the electoral process for federal offices.
-
D.
United States v. Stanley
United States v. Stanley is a U.S. Supreme Court decision that formed part of the Civil Rights Cases, in which the Court limited federal power to prohibit racial discrimination by private individuals and businesses.
-
E.
United States v. Gratiot
United States v. Gratiot is an 1840 U.S. Supreme Court case that upheld broad federal authority over public lands under the Constitution’s Property Clause.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
United States Supreme Court case
ⓘ
criminal law case ⓘ federal sentencing case ⓘ |
| alsoKnownAs |
U.S. v. Fanfan
ⓘ
linked to:
United States v. Fanfan
United States v. Ducan Fanfan (Booker companion case) ⓘ
linked to:
United States v. Fanfan
|
| areaOfLaw |
constitutional law
ⓘ
sentencing law ⓘ |
| arguedWith | United States v. Booker ⓘ |
| citation | 543 U.S. 220 ⓘ |
| citationStyle | case law ⓘ |
| constitutionalProvision |
Fifth Amendment to the United States Constitution
ⓘ
Sixth Amendment to the United States Constitution ⓘ
linked to:
U.S. Constitution, Sixth Amendment
|
| country |
United States
ⓘ
linked to:
United States of America
|
| court | Supreme Court of the United States ⓘ |
| decidedWith | United States v. Booker ⓘ |
| decisionDate | 2005-01-12 ⓘ |
| docketNumber | 03-47 ⓘ |
| followedBy | United States v. Booker ⓘ |
| fullName |
United States v. Ducan Fanfan
ⓘ
linked to:
United States v. Fanfan
|
| holding |
Mandatory enhancement of a sentence under the Federal Sentencing Guidelines based on judicial fact-finding violates the Sixth Amendment when it increases the sentence beyond that authorized by the jury verdict or defendant’s admissions.
ⓘ
The Federal Sentencing Guidelines cannot be applied as mandatory when they allow judges to find facts that increase sentences beyond the range supported by the jury verdict or plea. ⓘ |
| impact |
contributed to making the Federal Sentencing Guidelines advisory rather than mandatory
ⓘ
expanded application of Apprendi and Blakely principles to the federal sentencing system ⓘ reshaped federal sentencing by limiting mandatory guideline enhancements based on judicial fact-finding ⓘ |
| issue | Whether judicial fact-finding under the mandatory Federal Sentencing Guidelines violated the Sixth Amendment jury trial right. ⓘ |
| jurisdiction | federal ⓘ |
| language | English ⓘ |
| lowerCourt | United States District Court for the District of Maine ⓘ |
| lowerCourtHolding | Mandatory application of the Federal Sentencing Guidelines based on judicial fact-finding was unconstitutional under Blakely v. Washington. ⓘ |
| lowerCourtJudge | D. Brock Hornby ⓘ |
| petitioner |
United States
ⓘ
linked to:
United States of America
|
| precedent |
Apprendi v. New Jersey
ⓘ
Blakely v. Washington ⓘ |
| relatedCase |
Apprendi v. New Jersey
ⓘ
Blakely v. Washington ⓘ United States v. Booker ⓘ |
| relatedConcept |
advisory guidelines
ⓘ
judicial fact-finding ⓘ jury trial right ⓘ sentencing enhancements ⓘ |
| relatedTo |
United States Sentencing Guidelines
ⓘ
federal sentencing guidelines ⓘ
linked to:
United States Sentencing Guidelines
|
| respondent | Ducan Fanfan ⓘ |
| result | Federal Sentencing Guidelines rendered advisory rather than mandatory when applied in conjunction with United States v. Booker. ⓘ |
| subject |
constitutionality of mandatory federal sentencing guidelines
ⓘ
limits on judicial discretion in sentencing ⓘ role of juries in determining facts that increase criminal sentences ⓘ |
| subjectMatter | federal criminal sentencing ⓘ |
| term | October Term 2004 ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: United States v. Fanfan Description of subject: United States v. Fanfan is a U.S. Supreme Court case decided alongside United States v. Booker that helped reshape federal sentencing by limiting mandatory guideline enhancements based on judicial fact-finding.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: United States v. Fanfan
linked to: United States v. Fanfan
linked to: United States v. Fanfan