United States v. Sebastian Contreras
905 F.3d 853
5th Cir.2018Background
- HSI identified user “alex2smith13” uploading child sexual images on Kik in April 2016; Kik records tied that user to IP 108.37.82.115.
- Subpoenas to ISPs traced the IP to Frontier customer Saul Contreras at a Brownwood, TX residence where the Contreras family lived.
- In March 2017 Agent Dunagan obtained a search warrant for the home to seize devices and images; affidavit described digital storage habits, ability to recover deleted/remote files, and agent's experience.
- Agents executed the warrant April 4, 2017 and seized Sebastian Contreras’s laptop and external hard drive containing videos of sexual abuse of infants/minors.
- Contreras moved to suppress arguing (1) Frontier’s subscriber-records seizure violated his privacy and (2) the warrant affidavit lacked probable cause; district court denied the motion; Contreras conditionally pleaded guilty and appealed.
Issues
| Issue | Plaintiff's Argument | Defendant's Argument | Held |
|---|---|---|---|
| Reasonable expectation of privacy in ISP subscriber records | Contreras: family address in Frontier records was private and required a warrant | Government: subscriber info is third-party business data; no legitimate privacy expectation | No expectation of privacy; third-party doctrine applies |
| Validity of warrant / probable cause | Contreras: two uploads a year earlier and cell‑phone origin insufficient; information stale; affidavit lacked nexus to computers | Government: fair probability that uploads tied to residence; collectors keep files long; phones often sync with computers | Court need not decide probable cause because good-faith exception applies; warrant reliance reasonable |
| Applicability of Carpenter limitations | Contreras: Carpenter limits third-party doctrine in digital context, so ISP records require more protection | Government: Carpenter applies to cell-site location data, not ISP subscriber address records | Carpenter not controlling; Frontier records are business records not detailed location tracking |
| Good-faith exception to exclusionary rule | Contreras: challenged affidavit’s sufficiency (not arguing deliberate omissions) | Government: officers reasonably relied on magistrate-issued warrant; exceptions to Leon do not apply | Good-faith exception applies; suppression not warranted |
Key Cases Cited
- Carpenter v. United States, 138 S. Ct. 2206 (2018) (third‑party doctrine narrowed for cell‑site location records)
- Smith v. Maryland, 442 U.S. 735 (1979) (no expectation of privacy in numbers dialed; third‑party doctrine)
- United States v. Miller, 425 U.S. 435 (1976) (no expectation of privacy in bank records held by third party)
- United States v. Leon, 468 U.S. 897 (1984) (good‑faith exception to exclusionary rule)
- Illinois v. Gates, 462 U.S. 213 (1983) (totality‑of‑the‑circumstances probable‑cause standard)
- Florida v. Harris, 568 U.S. 237 (2013) (probable cause requires fair probability, not certainty)
- United States v. Michelletti, 13 F.3d 838 (5th Cir. 1994) (appellate review standard on suppression rulings)
- United States v. Perez, 484 F.3d 735 (5th Cir. 2007) (upholding residence search on single upload of child pornography)
- United States v. Vosburgh, 602 F.3d 512 (3d Cir. 2010) (single download can support probable cause)
- United States v. Hinojosa, 606 F.3d 875 (6th Cir. 2010) (two chat sessions supported probable cause)