A. The District Court’s Findings
Defendant contends that the district court’s findings were inadequate. In particular, he asserts that the district court did not resolve “hotly contested questions about the opening and search of the backpack.” Aplt. Br. at 19. We disagree.
“When factual issues are involved in deciding a motion, the court must state its essential findings on the record.” Fed.R.Crim.P. 12(d). But “Rule 12[ (d)] does not require detailed findings of facts as long as the essential basis of the court’s decision is apparent.” Toro-Pelaez, 107 F.3d at 824. The district court’s findings satisfied this standard. Those findings were expressed as follows:
Officer Perry goes on the train. It’s consensual. He doesn’t see a bag there.... Agent Perry gets off the train, comes back on the train ... and here is this green [sic] backpack, which the defendant says is not his.
People around him say it’s not theirs. People around him say nobody was sitting there. He brings the bag down and shows it to him and says, “Is this yours?” “No.”
Then it can be deemed to be abandoned by somebody....
So it was all consensual up to that point.
This is the wildest thing I’ve heard in a long time: “I’ve got my portfolio in the bag that belongs to somebody. I have no idea who he is or where he is, but I want to get my portfolio out.” So I open the bag, I take the portfolio out. Everything is consensual.
R. vol. 4 at 70-71.
Although the findings were delivered in an informal manner, the district court clearly found that Defendant’s actions were consensual, that Defendant opened the backpack, and that the backpack was abandoned. Nothing more was necessary.
B. Abandonment
Defendant next argues that the district court erred in ruling that the backpack had been abandoned. Defendant concedes that the backpack was abandoned when he denied that he owned it, but contends that once he informed Perry that his portfolio was inside the backpack, he “asserted sufficient interest in the backpack to preclude treatment of it as an abandoned object.” Aplt. Br. at 19. We are not persuaded.
“The test for abandonment is whether an individual has retained any reasonable expectation of privacy in the object.” United States v. Garzon, 119 F.3d 1446, 1449 (10th Cir.1997) (internal quotation marks omitted). Regardless of an individual’s subjective intent or understanding, the individual is treated as having abandoned an object if it would be unreasonable in the circumstances for the person to have an expectation of privacy with respect to that object. See United States v. Austin, 66 F.3d 1115, 1118 (10th Cir.1995) (although defendant “clearly intended to return and retrieve the bag,” in order for the bag not to be considered abandoned, he had to “show more than his subjective intent” — he had to demonstrate that his expectation of privacy was “one that society would recognize as objectively reasonable”) (internal quotation marks and ellipsis omitted).
As we proceed to explain, Defendant has failed to establish the reasonableness of any subjective expectation of privacy he may have had. Because the facts material to that issue are undisputed, our review is de novo. See Garzon, 119 F.3d at 1449.
By affirmatively denying to Perry that he owned the backpack, Defendant lost any objectively reasonable expectation of privacy in the backpack as a whole. To deny ownership is to announce to the world, “you want it, you can have it, as far as I’m concerned.” Having made that an