979 F.3d 219
4th Cir.2020Background
- Baltimore Police Department (BPD) implemented the Aerial Investigative Research (AIR) pilot with Persistent Surveillance Systems (PSS) to help solve violent crimes amid high homicide rates.
- AIR flies three planes by day (weather permitting), covering ~90% of the city; imagery renders people as pixelated dots and cannot by itself show facial/features or indoor movements.
- Analysts (PSS and BPD) access imagery only after a reported violent crime in a location; they may tag dots and reconstruct hours of public movement; data are retained 45 days unless used in prosecution.
- Plaintiffs sued under 42 U.S.C. § 1983 alleging Fourth and First Amendment violations and sought a preliminary injunction; the district court denied relief.
- The Fourth Circuit (Wilkinson) affirmed the denial, holding plaintiffs were likely photographed (standing) but unlikely to prevail on the merits; Chief Judge Gregory dissented, arguing Carpenter controls and AIR is unconstitutional dragnet surveillance.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Standing | Plaintiffs will be photographed by AIR and thus suffer concrete injury. | Defendants: any alleged injury is speculative and contingent. | Standing exists; likely to be photographed. |
| Fourth Amendment—reasonable expectation of privacy | AIR creates retrospective, citywide tracking that invades the privacy of public movements (Carpenter). | AIR is limited: daytime-only, pixelated dots, cannot track indoors or identify characteristics; akin to permissible short-term/public surveillance (Knotts/Ciraolo). | Plaintiffs unlikely to succeed; no reasonable expectation of privacy in AIR’s limited short-term public-movement surveillance. |
| Programmatic/suspicionless-search balancing (special-needs) | AIR is a dragnet targeting individuals and therefore cannot be justified as a suspicionless program. | AIR serves an important public-safety need; built-in limits and constrained access minimize privacy burdens. | Balancing favors the government: AIR is a permissible programmatic tool under the reasonableness balancing test. |
| First Amendment—associational chill & preliminary injunction factors | AIR will chill association and community organizing; irreparable harm warrants injunction. | Plaintiffs cannot show the program meaningfully deters public association; public interest and equities favor pilot continuation. | First Amendment claim unlikely to succeed; district court did not abuse discretion in denying preliminary injunction. |
Key Cases Cited
- Carpenter v. United States, 138 S. Ct. 2206 (2018) (CSLI long-term location tracking implicates Fourth Amendment privacy)
- United States v. Jones, 565 U.S. 400 (2012) (long-term GPS monitoring raises privacy concerns)
- United States v. Knotts, 460 U.S. 276 (1983) (limited expectation of privacy in public movements)
- California v. Ciraolo, 476 U.S. 207 (1986) (aerial observation within navigable airspace may not be a search)
- Dow Chemical Co. v. United States, 476 U.S. 227 (1986) (repeated aerial photography did not invade reasonable expectation of privacy)
- Florida v. Riley, 488 U.S. 445 (1989) (helicopter observation did not constitute search under certain conditions)
- Kyllo v. United States, 533 U.S. 27 (2001) (technology that infers private details can constitute a search)
- Winter v. Natural Res. Def. Council, 555 U.S. 7 (2008) (extraordinary nature and four-factor test for preliminary injunctions)
- Michigan Dep’t of State Police v. Sitz, 496 U.S. 444 (1990) (balancing test upholding checkpoint programmatic searches)
- Wikimedia Found. v. Nat’l Sec. Agency, 857 F.3d 193 (4th Cir. 2017) (standing where government collected communications)
