ORDER

PATRICK J. SCHILTZ, District Judge.

Defendant Cruz Rosales is charged with conspiring to distribute methamphetamine, cocaine, and marijuana in violation of 21 U.S.C. §§ 846 and 841(b)(1)(A). He is also charged with aiding and abetting the distribution of methamphetamine in violation of 21 U.S.C. § 841(b)(1)(A) and 18 U.S.C. § 2. This matter is before the Court on Rosales's motion to suppress evidence obtained as a result of a search of his carry-on bag at the Minneapolis/St. Paul International Airport on July 31, 2010. Magistrate Judge Jeffrey J. Keyes has held two evidentiary hearings on the motion and has issued a supplemental Report and Recommendation ("R&R") recommending that Rosales's motion be denied. See Docket No. 330. Rosales objects to this recommendation. Based on a de novo review, see 28 U.S.C. § 636(b)(1); Fed. R. Crim. P. 59(b)(3), the Court overrules Rosales's objection and denies his motion to suppress.

The background facts leading up to Rosales's arrival at the airport have already been described in detail in the Court's previous order. To summarize, Rosales and defendant Benjamin Perez were observed delivering drugs and money to defendant Noe Alamos Pantoja, who was the subject of a long-running narcotics investigation. The surveilling officers followed Rosales and Perez to the airport, where they were searched and were each found to be in possession of large amounts of cash. After an initial evidentiary hearing, Judge Keyes recommended denying Rosales's motion to suppress the cash. The Court declined to adopt this recommendation, however, because it was not clear who searched Rosales, why he was searched, and where or how the cash was found.1

At a second evidentiary hearing, the government introduced evidence about the events at the airport. Judge Keyes thoroughly described that evidence in the supplemental R&R, and the Court gives only a brief summary here. After arriving at the airport, Rosales and Perez attracted the attention of agents of the Transportation Security Administration ("TSA"). Based on their observations, the TSA agents decided to conduct a "secondary screening" of Rosales and Perez. During the secondary screening, a TSA agent searched Rosales's bag and found an unsealed, business-size envelope containing a large amount of cash as well as several vehicle titles and photographs. Docket No. 329 at 41, 46-47. The agent did not count the cash, but estimated it to be "easily over $5,000." Docket No. 329 at 41. Rosales now seeks to suppress evidence of the cash.

The government argues that the search of Rosales's bag was justified as an administrative search performed for the purpose of ensuring airline security. See United States v. Aukai, 497 F.3d 955, 960 (9th Cir. 2007) (en banc). Many courts have upheld such searches, and Rosales does not dispute that the TSA could properly search his bag.2 But Rosales argues that the TSA's search of the envelope found in his bag was unconstitutional. Rosales compares this case to United States v. Kroll, 481 F.2d 884 (8th Cir. 1973), in which the Eighth Circuit found that an airport search of an envelope found in a briefcase exceeded the scope of the search that was permissible under the circumstances.

Recognizing that the facts of this case are almost identical to those in Kroll, the government does not attempt to distinguish Kroll. Instead, the government emphasizes that the Kroll court explained that its holding was based on "the present state of the art of miniaturization of dangerous explosive devices" and acknowledged that it is "entirely conceivable that miniaturization of explosives of sufficient force to constitute a threat to an aircraft could, in the future, be developed to a degree" that could lead to a different result. Kroll, 481 F.2d at 887 n.4 (quotations omitted).3 The government argues that the limited holding in Kroll does not control this case in light of the existence of new technology such as "sheet explosives," which (as described by the Ninth Circuit) are "thin, flat explosives [which] may be disguised as a simple piece of paper or cardboard, and may be hidden in just about anything, including a laptop, book, magazine, deck of cards, or packet of photographs." United States v. McCarty, 648 F.3d 820, 825 (9th Cir. 2011).4

Although it is a close question — particularly given the lack of detail about the discovery of the envelope and why the TSA agent looked inside of it — the Court concludes that the search of the envelope was lawful. "[T]he ultimate touchstone of the Fourth Amendment is `reasonableness' . . . ." Brigham City v. Stuart, 547 U.S. 398, 403 (2006). The government did not offer direct evidence of the condition of the envelope, but it is reasonable to infer that a standard, business-size envelope containing thousands of dollars of cash — as well as vehicle titles and photographs — would be quite bulky. It was thus reasonable for the TSA to take at least a cursory look in the envelope to confirm that it did not contain sheet explosives.5 In addition, unlike several recent cases in which courts have held that a TSA agent's search went beyond the permissible scope of an airport-screening search, see McCarty, 648 F.3d at 836; United States v. Fofana, 620 F.Supp.2d 857, 863-65 (S.D. Ohio 2009), here there is absolutely no evidence that the TSA agent's search was motivated by anything other than legitimate security concerns. The agent did not know that Rosales was under surveillance or even that Rosales was suspected of criminal activity; in fact, the agent permitted Rosales to leave with his cash after the screening procedure was complete. The Court therefore finds that, in light of changes in technology since Kroll was decided in 1973, the search of the envelope was within the proper scope of an airport-screening search.

Finally, Rosales also challenges the seizure of his cash by the Airport Police Department, which happened after Rosales voluntarily returned to the screening area and was then brought (along with Perez) to the airport police-operations center.6 Rosales argues that probable cause for the seizure was lacking and that there was no basis for a warrantless seizure.7 Although the government contends that there was probable cause, the government does not identify any justification for the warrantless nature of the seizure. Instead, the government essentially argues that the legality of the seizure is moot because it does not intend to introduce the cash into evidence at trial. Taking the government at its word, the Court will deny Rosales's motion to suppress evidence of the seizure as moot.8

ORDER

Based on all of the files, records, and proceedings herein, the Court ADOPTS IN PART the October 28, 2011 supplemental R&R [Docket No. 330] insofar as the R&R recommends the denial of Rosales's motion to suppress evidence of the results of the July 31, 2010 search of Rosales by agents of the Transportation Security Administration. Accordingly, IT IS HEREBY ORDERED THAT: