Thomas Dale Peterson asserts that a police SWAT team failed to fully comply with the knock-and-announce requirement prior to executing a warrant to search his residence. He appeals the denial of his motion to suppress the evidence found. Because the SWAT team’s entry in this case violated neither the Fourth Amendment nor 18 U.S.C. § 3109, we affirm.
I
In late 2001, Vancouver, Washington, police officers, acting in cooperation with police in nearby Portland, Oregon, learned that Peterson was involved in an identity theft operation and other criminal conduct. This information came from three sources who supplied probable cause for issuance of the search warrant. The first source told police that Peterson and an associate named Tai Watson had been stealing mail in Portland and Vancouver. 1 According to this source, Peterson possessed a ring of duplicate U.S. Postal Service mailbox keys, and the floor of Peterson’s room in his Vancouver residence was littered with stolen mail. The source also told police that Watson possessed a black SKS assault rifle and some two-part (binary) plastic explosives. 2
According to the first source, after Watson was arrested he phoned from jail and requested that the source transfer the explosives (which Watson and the source referred to as “the bin Laden”) from Watson’s apartment to a second apartment in Beaverton, Oregon. Based on this information, the police sought and received consent to search the second apartment, where they seized approximately two pounds of Kinepak binary explosives.
A second source further informed police that Peterson was a “master” forger and identity thief who used a computer to produce fraudulent checks and false identification. This individual also reported that Peterson used methamphetamine and heroin and that Watson had brought $3,000 worth of explosives to Peterson’s residence in early November 2001. The second source supplied police with a map to Peterson’s residence on 4th Way in Vancouver.
On December 5, 2001, a third source confirmed to police that Peterson lived on 4th Way and that he used a computer in his bedroom to create fake checks and *1047 identification. This source further reported that Peterson had about 200 pieces of stolen mail strewn about his room, and that within the previous week the source had seen Peterson in possession of blasting caps and pink liquid explosives. Specifically, this source reported that the explosives and blasting caps were hidden in Peterson’s bedroom closet and that Peterson had claimed “if we want to blow some shit up we can at any time.”
In light of this information, Vancouver police sought and received a state warrant to search Peterson’s residence. 3 Because of the suspected presence of explosives, police commanders considered the execution of the search warrant to be high-risk. Accordingly, they decided to seek assistance from officers specially trained and equipped for such duties, and recruited the Southwest Washington Regional SWAT team to serve the warrant.
In preparation for this operation, the SWAT team held a pre-raid briefing at 7:00 p.m. on December 5, 2001. The team was told that Peterson’s house would most likely contain both explosives and items pertaining to identity theft and check fraud, including many pieces of stolen mail. The team was also informed that Peterson and others at the residence were suspected of drug use. Although the team was told there were no known firearms at the location, police knew that Peterson had an outstanding Oregon arrest warrant for carrying a concealed weapon without a permit. Continuing surveillance during the briefing session reported that at least three to four people were then inside Peterson’s residence.
Just after 8:00 p.m., the SWAT team deployed to Peterson’s residence. The team members wore helmets and raid clothing clearly labeled “POLICE” in large reflective letters. Officers surrounded the house and closed off traffic in the neighborhood. An ambulance was positioned nearby in case of need. The main entry team proceeded to the front door, led by Corporal Lobdell. The team members began taking their final positions, although they were not yet ready to knock and announce their identity and intentions.
What happened next was the subject of disputed testimony at the evidentiary hearing on Peterson’s motion to suppress. However, in response to the government’s request for a factual finding at the close of the hearing, the district court expressly credited Lobdell’s version of the events. This finding was not clearly erroneous. Accordingly, we adopt Lobdell’s version of the facts.
According to Corporal Lobdell, just before he was ready to knock, someone inside the house — later identified as Guy Edwards, the boyfriend of Peterson’s housemate — suddenly opened the front door. According to Edwards’s testimony, he heard noises outside and was checking for a possible prowler when he surprised the police in the final throes of staging for their entry. Edwards, who admitted at the hearing that he recognized the group on the porch as police officers, immediately attempted to close the door. Lobdell responded by shouting “Police, with a search warrant;” he forced the door open, and led the SWAT team inside. Virtually simultaneously, other officers on either side of the house broke windows to gain entry. In the course of breaching the house, the SWAT team threw inside three noise flash distraction devices (also called “stun grenades”). The occupants were swiftly subdued and the police seized a quantity of binary explosives, six blasting caps, 5.8 *1048 grams of methamphetamine, a quantity of tar heroin, over 1000 pieces of stolen mail, more than 20 fake IDs, illegal duplicates of mailbox keys, a laminator, a credit card imprinting machine, counterfeit and forged checks, and $10,500 in cash.
The district court denied Peterson’s motion to suppress these items as the fruits of an illegal search. Peterson entered a conditional plea of guilty to one count of possession of stolen mail, one count of bank fraud, and one count of being a felon in possession of explosives. This plea, while conditioned on Peterson’s right to appeal the denial of his motion to suppress, did not specifically reserve the right to claim on appeal that the police employed excessive force during execution of the search warrant.
The instant appeal ensued. There is no challenge to our jurisdiction under 28 U.S.C. § 1291.
II
We review de novo the district court’s denial of Peterson’s motion to suppress.
See United States v. Fernandez-Castillo,
A
Peterson first argues that the entry of his residence was unreasonable under the Fourth Amendment. The district court correctly rejected this claim.
In
Richards v. Wisconsin,
The police in
Richards
obtained a warrant to search a suspect’s motel room for drugs. A plainclothes officer knocked on the door and identified himself as a maintenance man. Leaving the chain on the door, Richards peeked out. Catching sight of a uniformed officer standing behind the plainclothes officer, Richards quickly closed the door. The officers forced their way into the room, apprehended Richards as he attempted to escape through a window, and discovered drugs hidden above ceiling tiles in the bathroom.
See Richards,
*1049 On the record before us, we see this case as closely analogous to Richards. Exigent circumstances arose during staging for the entry in both cases. A no-knock entry was clearly justified here. Indeed, only two of the three contemplated justifications for a no-knock entry were present in Richards (futility and potential destruction of evidence). Here, the SWAT team deployed to Peterson’s residence encountered all three (futility, potential destruction of evidence, and danger).
Turning first to the issue of futility, the SWAT team originally intended to announce its presence. However, just as this announcement was about to be made, Edwards unexpectedly opened the door, saw that police were outside, and attempted to deny them entry. Were we to hold that the police were required to announce then-presence in this case and wait some further period of time while the occupants reconsidered whether to admit or resist them, it would amount to mandating a meaningless act. Announcement would have been futile. Just as one cannot close a door that is already closed, one cannot “announce” a presence that is already known. The Fourth Amendment’s “touchstone of reasonableness,”
United States v. Ramirez,
In addition to Edwards’s conduct, the government points to the exigencies of danger and the potential destruction of evidence as justification for the manner in which the warrant was served.
See United States v. Banks,
540 U.S. -,
First, the SWAT team reasonably believed that Peterson’s residence contained explosives. Ample probable cause supported this conclusion. The officers’ concern was not generalized and subjective; it was based on information received from two separate sources.
See United States v. Granville,
*1050
This particularized fear of the potential for danger provided further justification for the SWAT team’s no-knock entry.
See Bailey v. Newland,
Second, the SWAT team knew that Peterson’s residence very likely contained methamphetamine. Once the occupants knew police were outside, the suspected presence of drugs — -the quintessential disposable contraband — -provided yet another justification for the no-knock entry.
See Richards,
United States v. Banks,
the Supreme Court’s most recent pronouncement on the execution of residential search warrants, reaffirmed the Court’s well-established rule of treating “reasonableness as a function of the facts of cases so various that no template is likely to produce sounder results than examining the totality of eircum-stances in a given case.”
Peterson challenges the fact that the SWAT team’s preliminary pre-raid plan for serving the warrant seems to have contemplated dispensing with the requirements of the knock and announce rule. Specifically, both of the government’s witnesses at the hearing (Corporal Lobdell and Sergeant Chapman) testified that the team intended to forcibly enter Peterson’s residence immediately after knocking and announcing. The Supreme Court has said that in the usual case police must give the inhabitants a reasonable opportunity to let them in before breaking down the door. See id. But the Court in Banks recognized that “if circumstances support a reasonable suspicion of exigency when the officers arrive at the door, they may go straight in.” Id. When Edwards affirmatively refused to admit the police, the factors of futility, danger, and potential destruction of evidence supported the officers’ decision to enter immediately. 5
In short, any predetermined strategy for effecting the raid fell by the wayside, and immediate entry was justified. The lawfulness of the team’s original plan is not relevant to our consideration; our role is to evaluate the events as they actually transpired.
See Richards,
B
Peterson next contends that the SWAT team violated the “knock and announce” statute, 18 U.S.C. § 3109. We disagree.
Section 3109 provides:
Breaking doors or windows for entry or exit
The officer may break open any outer or inner door or window of a house, or any part of a house, or anything therein, to execute a search warrant, if after notice of his authority and purpose, he is refused admittance or when necessary to liberate himself or a person aiding him in the execution of the warrant.
18 U.S.C. § 3109 (emphasis added). Edwards obviously knew that by trying to close the door he was denying entry to the police. Thus, under the plain language of the statute the entry was lawful.
Furthermore, the exigent circumstances we discuss with regard to the Fourth Amendment apply with equal force in the § 3109 context.
See Ramirez,
C
Finally, Peterson asserts that the officers employed excessive force during execution of the search warrant. However, this issue is not properly before us as a separate claim because it was not expressly preserved for appeal in the conditional plea agreement.
See
Fed.R.Crim.P. § 11(a)(2);
United States v. Colin,
Ill
The district court properly ruled that the police in this case did not violate Peterson’s rights. On the contrary, they completed a difficult and potentially dangerous entry in a lawful and professional manner without injuring anyone. The denial of Peterson’s motion to suppress, and his conviction and sentence, are therefore
AFFIRMED.
Notes
. Watson had been arrested ten days earlier in connection with a mail theft investigation in Portland.
. Binary explosives consist of two component chemical halves, which when combined become an explosive. A detonator is then required to initiate the explosion. Binary explosives are safer to store than dynamite but just as powerful.
. Peterson does not challenge the validity of the search warrant, only the manner in which it was executed.
. Although the search in
Miller
was deemed unconstitutional, this case is clearly distinguishable. In
Miller,
it was ambiguous whether the suspect recognized the police at his door.
See
. We note that in a particular case any one of these factors may be sufficient to justify a no-knock entry. However, the Fourth Amendment reasonableness test analyzes totality of the circumstances. We do not break down the situation faced by police into its component parts and evaluate the strength of each justification seriatim. Here, all three factors were present, and the facts considered together more than adequately established exigent circumstances.
