Juan Hernán Lemus appeals the district court’s denial of his motion to suppress incriminating evidence discovered during a warrantless search of his apartment following his arrest. Even assuming that there were no articulable facts which would warrant a reasonably prudent police officer to believe that Lemus’s apartment harbored an individual posing a danger to those on the arrest scene, we nevertheless
*960
affirm the district court’s denial of the suppression motion. Because the area in which the police officers discovered the incriminating evidence “immediately ad-jointed] the place of arrest,” the officers were justified in conducting a search of that area without either probable cause or reasonable suspicion,
Maryland v. Buie,
I
When Detective Longoria clocked in to the office at six o’clock to report for his morning briefing, Sergeant Gerardo was waiting for him. The Sergeant informed him that the DA had issued a warrant for the arrest of Juan Hernán Lemus, of Calexico. Detective Longoria had dealt with Lemus before. A year or so back he had been to Lemus’s place for a probation search, and found drugs. But Detective Longoria knew Lemus wasn’t just into drugs. He recalled that Lemus had been a member of a group busted for a drive-by shooting. And he remembered that some of Lemus’s cousins had been arrested for violent crimes.
Detective Longoria checked the database. Lemus’s arrest warrant was in there. It looked like Lemus was still living at the same place, an apartment out on Sixth Street. If he remembered right, it was part of a small complex with a house and two other apartments. Some of Le-mus’s family members lived there too.
He and Detective Diaz drove out to Sixth Street. They parked in front of Lemus’s residence, and started watching for Lemus. An hour later, he appeared, walking out of his apartment and over to his mother’s house. Shortly after, he left his mother’s house and walked back to his apartment, carrying a beige envelope. Nothing looked out of place. Lemus was just heading back toward his apartment. But Detective Longoria thought he’d better call in some more units. Lemus might be dangerous if cornered.
The detectives drove up to the side of Lemus’s apartment and pulled up next to a fence surrounding the property. Detective Longoria jumped out and started calling to Lemus. Lemus saw them and asked what was going on. The detectives responded that Lemus had an outstanding arrest warrant and that they were going to take him into custody.
No response. Lemus slowly backed away, toward the sliding glass door on the side of his apartment.
Sergeant Gerardo and Officer Orozco arrived for backup. They tried to explain the situation to Lemus from across the fence. But he continued to retreat towards his apartment. He opened the sliding glass door.
The officers continued to tell Lemus to come out, but Lemus instead started to walk into the apartment. The officers were there in an instant, taking hold of Lemus and handcuffing him before he could fully enter the doorway and retreat into his living room.
Detective Longoria thought he’d better check to make sure no one was hiding out in the apartment. He sent Gerardo and Orozco in. They scanned the living room, and didn’t see anyone. Just a couch and a TV. Checked the bedroom and bathroom too. Negative. Lemus was alone.
Diaz, in the living room, got Detective Longoria’s attention. Wasn’t there something sticking out from the couch? Detective Longoria thought it looked like the butt of a weapon. Since Lemus was a felon, having a gun would be a crime. *961 Detective Longoria lifted the couch cushion to make sure, and confirmed that it was a semi-automatic handgun. It was later determined to be a Sturm and Ruger, 9 millimeter.
Detective Longoria let the cushion fall. He thought he should get a search warrant before touching the gun — he didn’t want to lose the chance to seize it. He left the officers at the scene to keep things secure, and headed back to the station.
The warrant was issued, and the Ruger was seized. After agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives discovered that the weapon was manufactured in Arizona and had been moved in interstate commerce, a grand jury returned a one-count indictment charging Lemus with being a felon knowingly in possession of a firearm in violation of 18 U.S.C. § 922(g)(1) and 18 U.S.C. § 924(a)(2). In district court, Lemus moved to suppress the pistol, claiming that it was obtained unlawfully because it was discovered during a warrantless search. When the district court denied the motion, Lemus entered a conditional guilty plea preserving his right to appeal the district court’s denial of his suppression motion. See FED. R. CRIM. P. 11(a)(2). This appeal followed.
II
We review de novo the district court’s determination of Lemus’s motion to suppress, and may affirm the district court’s denial of the motion “on any basis supported in the record,”
United States v. Lopez,
A
The Fourth Amendment protects “[t]he right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures____” U.S. Const, amend. IV. Because “[i]t is axiomatic that ‘the physical entry of the home is the chief evil against which the wording of the Fourth Amendment is directed,’”
Welsh v. Wisconsin,
Nevertheless, because “[t]he touchstone of the Fourth Amendment is reasonableness, and the reasonableness of a search is determined ‘by assessing, on the one hand, the degree to which it intrudes upon an individual’s privacy and, on the other, the degree to which it is needed for the promotion of legitimate governmental interests,’ ”
United States v. Knights,
In
Chimel,
the Court authorized a narrow search of the arrestee’s “person and the area from within which he might have obtained either a weapon or something that could have been used as evidence against him.”
Later, in
Buie,
the Court refined its analysis in
Chimel.
It noted the “interest of the [arresting] officers in taking steps to assure themselves that the house in which a suspect is being, or has just been, arrested is not harboring other persons who are dangerous and who could unexpectedly launch an attack” and described two types of searches that might immediately follow an arrest and for which a warrant was not required.
B
In this case, we need not decide whether Detective Longoria or the other investigating officers had “articulable facts which ... would warrant [the officers] in believing that the area to be swept harbored] an individual posing a danger to those on the arrest scene” that would justify a protective sweep.
Buie,
According to Buie, a “protective search ‘incident to the arrest’” 2 to protect the arresting officers from the danger of a surprise attack can be completed without reasonable suspicion or probable cause if two conditions are present. First, the area searched must “immediately adjoin[ ]” the area of arrest. Id. Second, the area searched must be one “from which an attack could be immediately launched,” and thus in any event must be capable of concealing at least one person. Id. Both of these conditions are satisfied here.
Although the exact location of Lemus’s arrest was disputed in the district court, the district court found that he was apprehended shortly after he had “stepped into the apartment breaking the threshold of the sliding glass door.” This finding was not clearly in error. Even taking Lemus’s account of the events as authoritative, it is clear that at most Lemus was only partially outside the living room when he was arrested. The living room thus “immediately adjoined” the area where Lemus was arrested.
Cf. Peals v. Terre Haute Police Dep’t,
Lemus’s living room not only immediately adjoined the area of arrest, but was a place from which an attack could be immediately launched. The district court found that Lemus had opened the sliding glass door, which created additional hazards for the officers. We have recognized that “[a] bullet fired at an arresting officer standing outside a window is as deadly as one that is projected from one room to another.”
United States v. Hoyos,
Because the living room immediately adjoined the place of arrest and was large enough to contain an attacker, we need not reach the second prong of
Buie
and decide whether the search of the living room was justified as a “protective sweep.” The officers were permitted to search the room “as a precautionary matter” without either reasonable suspicion or probable cause to believe that an attacker lay in ambush.
Buie,
C
Because the police officers were lawfully permitted by
Buie
to enter the “immediately adjoining” living room to search for potential assailants, they could also seize the firearm under the “plain view” doctrine if (1) the weapon was in “plain view” and (2) “its incriminating character [was] immediately apparent.”
Horton,
Detective Longoria’s un-rebutted testimony established that the weapon was in plain view. The testimony made clear that Detective Diaz noticed something sticking out from under a couch cushion, and when Detective Longoria raised the cushion, he saw clearly that it was the butt of a pistol.
Detective Longoria’s prior experience with Lemus made the incriminating nature of the evidence immediately apparent, because the detective had “probable cause to believe that [the pistol was] associated with criminal activity.”
Stafford,
*965
Detective Longoria’s decision to lift the couch cushion to confirm his belief did not render the search unconstitutional. Once the detective realized that the weapon was illegal, he was justified in lifting the couch cushion to confirm his beliefs.
See Arizona v. Hicks,
Ill
Because the warrantless search of Le-mus’s living room was justified as a protective search incident to arrest, no Fourth Amendment violation occurred when police officers discovered the semi-automatic pistol. Accordingly, we affirm the district court’s denial of the motion to suppress.
AFFIRMED.
Notes
. We also need not decide whether Detective Longoria's search of the living room is authorized as a search of the area "within [Le-mus’s] immediate control.”
See United States v. Hudson,
. Although other courts have labeled this type of search a "protective sweep,”
see, e.g., United States v. Waldner,
. In fact, the police officers were even more careful than necessary. Although they were justified in seizing the weapon when they first entered Lemus's apartment, they proceeded to obtain a search warrant before removing the pistol from the premises.
