Browse 26 fourth amendment search and seizure cases decided by First Circuit. AI-powered summaries, holdings, and legal analysis.
First Circuit Upholds Warrantless Search Based on Informant Tip and Controlled Buy
Lopez Martinez v. Blanche, decided by First Circuit on April 23, 2026, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of a motion to suppress evidence seiz...
First Circuit Affirms Denial of Motion to Suppress Evidence in Vehicle Search
United States v. Giang, decided by First Circuit on April 22, 2026, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of a motion to suppress evidence seized ...
Probable Cause and Consent Justify Vehicle Search
Taveras Martinez v. Blanche, decided by First Circuit on April 17, 2026, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of a motion to suppress evidence se...
First Circuit Upholds Warrantless Vehicle Search Based on Probable Cause
United States v. Cartagena, decided by First Circuit on April 15, 2026, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of the defendant's motion to suppres...
Consent to search upheld despite language barrier
United States v. Nieves-Diaz, decided by First Circuit on April 14, 2026, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of the defendant's motion to suppr...
First Circuit Upholds Drug Trafficking Conviction Amid Evidentiary Challenges
United States v. Calderin-Pascual, decided by First Circuit on April 3, 2026, resulted in a defendant win outcome. The First Circuit affirmed the defendant's conviction for drug trafficking and illega...
First Circuit Upholds Warrantless Vehicle Search Based on Probable Cause
United States v. Munoz-Fontanez, decided by First Circuit on February 27, 2026, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of a motion to suppress evid...
First Circuit Upholds Warrantless Vehicle Search Based on Probable Cause
United States v. Shea, decided by First Circuit on February 23, 2026, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of the defendant's motion to suppress ...
First Circuit Upholds Warrantless Vehicle Search Based on Probable Cause
United States v. McBreairty, decided by First Circuit on February 20, 2026, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of the defendant's motion to sup...
First Circuit: Consent to Search Electronic Devices Was Voluntary
United States v. Yoon, decided by First Circuit on February 20, 2026, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of a motion to suppress evidence obtai...
First Circuit: SEC ALJs are Principal Officers, Unconstitutionally Appointed
SEC v. Veldhuis, decided by First Circuit on February 19, 2026, resulted in a defendant win outcome. The First Circuit affirmed the district court's decision, holding that the SEC's administrative law...
First Circuit: Consent to cell phone search was voluntary, not coerced
United States v. Rowell, decided by First Circuit on February 18, 2026, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of the defendant's motion to suppres...
First Circuit: Consent to search laptop voluntary despite arrest
United States v. Abbas, decided by First Circuit on January 29, 2026, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of a motion to suppress evidence seize...
First Circuit: DNA collection from arrestees is a reasonable search
Doe v. City of Boston, decided by First Circuit on January 27, 2026, resulted in a defendant win outcome. The First Circuit affirmed the district court's dismissal of a lawsuit brought by John Doe aga...
Consent to search cell phone during arrest was voluntary, court rules
United States v. Camillo, decided by First Circuit on January 27, 2026, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of the defendant's motion to suppres...
First Circuit: Probable Cause for Vehicle Search Based on Marijuana Odor and Paraphernalia
United States v. Minor, decided by First Circuit on January 27, 2026, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of a motion to suppress evidence seize...
Laptop search incident to arrest upheld
United States v. Papantoniadis, decided by First Circuit on January 21, 2026, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of a motion to suppress eviden...
First Circuit Upholds Warrantless Vehicle Search Based on Probable Cause
United States v. Maldonado-Velazquez, decided by First Circuit on January 16, 2026, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of the defendant's motio...
First Circuit Upholds Warrantless Vehicle Search Based on Probable Cause
United States v. Del-Valle-Camacho, decided by First Circuit on January 14, 2026, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of the defendant's motion ...
First Circuit Upholds Warrantless Vehicle Search Based on Probable Cause
United States v. Mello, decided by First Circuit on January 7, 2026, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of the defendant's motion to suppress e...
First Circuit Affirms Denial of Injunction Against Florida's "Stop WOKE Act"
Ramos-Hernandez v. Bondi, decided by First Circuit on December 22, 2025, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of a preliminary injunction sought ...
Probable Cause Justifies Vehicle Search Despite Traffic Stop
United States v. Diaz-Colon, decided by First Circuit on December 22, 2025, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of a motion to suppress evidence...
First Circuit Upholds Warrantless Vehicle Search Based on Probable Cause
United States v. Griffin, decided by First Circuit on December 19, 2025, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of the defendant's motion to suppre...
First Circuit: Probable Cause Justified Vehicle Search After Traffic Stop
Terenzio v. Urena, decided by First Circuit on December 18, 2025, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of a motion to suppress evidence seized fr...
Consent to Search Phone Was Voluntary, Court Rules
United States v. Abercrombie, decided by First Circuit on December 16, 2025, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of a motion to suppress evidenc...
Consent to Search Electronic Devices Upheld Despite Language Barrier
United States v. Yu, decided by First Circuit on December 11, 2025, resulted in a defendant win outcome. The First Circuit affirmed the district court's denial of the defendant's motion to suppress ev...
CaseLawBrief currently tracks 26 fourth amendment search and seizure cases from First Circuit. This number is updated as new opinions are published.
Outcome breakdown: Defendant Win: 26.
Each case page on CaseLawBrief includes an AI-generated plain English summary, key holdings, and legal analysis. Click any case above to read its full analysis.