United States v. Syed Ahmad, 21 F.4th 475

Deputy Suttles, conducting interstate drug interdiction, followed an RV with a dirty Idaho plate into a Love’s truck-stop and observed the driver, Syed Ahmad, and a passenger behaving oddly according to a store employee.
Suttles approached, told Ahmad he was "free to leave" and asked routine questions about the trip; Ahmad retrieved and handed over his driver’s license and the RV rental agreement.
The deputy briefly retained the documents to run checks, asked for consent to search the RV, and Ahmad consented.
Suttles called a trooper with a drug dog; Ahmad consented to an exterior dog sniff. The dog alerted about 15 minutes into the encounter.
After the alert, Ahmad was detained, the RV was searched, and a large quantity of marijuana was found; Ahmad was indicted and moved to suppress, arguing the initial retention of his ID/rental agreement constituted a seizure rendering his consent involuntary.
The district court denied suppression; the Seventh Circuit affirmed, holding the brief retention of documents did not convert the consensual encounter into a Fourth Amendment seizure and Ahmad’s consents were voluntary.

Issue	Ahmad's Argument	Government's Argument	Held
Whether the deputy’s brief retention of Ahmad’s driver’s license and rental agreement transformed a consensual encounter into a Fourth Amendment seizure, invalidating subsequent consent to search	Retention of ID/docs that are necessary to leave the scene amounted to a seizure, so his consent was coerced and involuntary	The encounter remained consensual: Ahmad was told he was free to leave, was not physically restrained or threatened, and documents were held only briefly	The retention was brief and occurred in a public, noncoercive encounter; no seizure occurred until the dog alerted, so consent was voluntary
Whether Ahmad’s consent to the exterior dog sniff and the ensuing search was voluntary	Consent was tainted by the prior illegal seizure (retention of documents) and thus involuntary	Consent was given voluntarily during a nonseizure encounter; dog sniff occurred after consent and dog alerted, justifying detention and search	Consent to both the dog sniff and the search was voluntary; detention and search after the alert were lawful

Arizona v. Gant, 556 U.S. 332 (2009) (warrantless searches invalid unless an established exception applies)
Schneckloth v. Bustamonte, 412 U.S. 218 (1973) (consent searches valid if consent is voluntary)
Florida v. Bostick, 501 U.S. 429 (1991) (approach-and-question encounters do not automatically constitute seizures)
Michigan v. Chesternut, 486 U.S. 567 (1988) (seizure occurs only if a reasonable person would not feel free to leave)
United States v. Tyler, 512 F.3d 405 (7th Cir. 2008) (officers’ retention of ID and an express statement that one could not leave can create a seizure)
United States v. Cordell, 723 F.2d 1283 (7th Cir. 1983) (retention of ID combined with informing suspect of a narcotics investigation converted encounter to detention)
United States v. Soto-Lopez, 995 F.2d 694 (7th Cir. 1993) (brief retention of documents during an interview did not necessarily convert a consensual encounter into a seizure)