Sheridan Walker was indicted in the United States District Court for the District of New Mexico on charges of being a felon in possession of firearms and certain types of ammunition, see 18 U.S.C. §§ 922(g)(1) and 924(a)(2). He moved to suppress the evidence found in his home during a sweep by police officers, and the district court denied the motion. He then pleaded guilty to the charges but reserved his right to appeal the denial of his motion to suppress. On appeal he challenges that denial. We have jurisdiction under 28 U.S.C. § 1291. We reverse the decision of the district court and remand for it to determine whether exigent circumstances may have allowed police to search the house for victims in need of immediate aid.
I. FACTS
In the early afternoon of October 26, 2008, an anonymous woman called 911 in Roosevelt County to report that two men at 1868 Highway 236 had guns and were threatening to kill each other. When the dispatcher asked the caller what the two men were doing at the moment, she replied, “I don’t know. I left.” R. Vol. Ill at 98-99. At 12:33 p.m. the dispatcher forwarded the information to Deputy Sheriff Malin Parker. Parker attempted to confirm the address by reference to the Sheriffs home, which he knew to be at 600 Highway 236. After an apparent miscom-munication with the dispatcher, he arrived at the home next door to the Sheriffs, where a woman was standing outside gardening. He asked the woman whether she had heard any gunshots or seen anything unusual in the neighborhood; she replied that she had not. Parker quickly realized that he was at the wrong house, and that 1868 Highway 236 was on the other side of the Sheriffs home. Once he saw the house at 1868 Highway 236, he recognized it from previous experience as that of Sheridan Walker.
Despite the confusion Deputy Parker arrived at the Walker residence within nine or ten minutes of the dispatch alert. He saw no cars or people near the house. As he approached the house, he heard over his police radio that Deputy Raul Rosa was meeting with John Walker — Sheridan’s son — at the police station. During the meeting Rosa had heard the alert and noticed that the address was John Walker’s. Parker radioed Rosa to ask whether John Walker had said anything about someone at the house being armed, but Rosa had no additional information. Parker then asked Rosa who was involved in the altercation mentioned in the alert; Rosa replied that it was supposed to be John'and Sheridan Walker.
As Deputy Parker walked to the door of the Walker home, two other officers arrived. He knocked several times on the storm door (which was glass with a metal frame) and announced himself each time by saying “Sheriffs office,” R. Vol. Ill at 20 (emphasis omitted); but he got no response. He opened the storm door to knock on the inner wooden door, which was about 10 inches ajar. (Although Mr. Walker’s wife testified that the door had a doorbell, Parker testified that he did not see one, or he would have used it). As he knocked, he announced in a loud, commanding voice that he was from the Sheriffs office. His knock caused the door to open further, but he saw no one inside and nothing indicating that a physical struggle had taken place. He again announced “Sheriffs office,” at which point he heard a voice shout from inside the house, “Yeah, and I got a goddamn gun.” Id. at 22 (emphasis omitted).
Deputy Parker and the two other officers immediately entered the home and *1252 ordered the speaker, Sheridan Walker, to keep his hands in the air. The officers subdued Mr. Walker, handcuffed him, and took him to the front porch. But they did not place him under arrest. Parker testified that because the dispatcher had reported two men with guns in the house, the officers suspected that someone else might still be in the house, either hurt or posing a threat to the officers. They therefore conducted a sweep of the bedrooms, bathrooms, and closets, looking where someone could have been hiding. During that sweep they discovered firearms in plain view in two of the bedrooms. A check on the firearms determined that several were stolen, so Mr. Walker was arrested. Mr. Walker was indicted on two counts: one for being a felon in possession of the firearms found during the sweep, and one for being a felon in possession of ammunition.
II. DISCUSSION
Mr. Walker contends that the evidence seized from his home must be suppressed because (1) the entry into his home was unlawful and (2) even if the entry was lawful, the sweep of his home was not. “When reviewing the denial of a motion to suppress, we view the evidence in the light most favorable to the government, accept the district court’s findings of fact unless clearly erroneous, and review de novo the ultimate determination of reasonableness under the Fourth Amendment.”
United States v. Apperson,
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. Public officials trigger the amendment’s protections when they intrude upon an individual’s reasonable expectation of privacy.
See Kyllo v. United States,
In particular, the Fourth Amendment imposes strict limits on when law-enforcement officers may enter a home without a warrant.
See United States v. McCullough,
A. Initial Entry
Mr. Walker challenges the entry into his home on two grounds. First, he contends that Deputy Parker violated the Fourth Amendment by opening the screen door to knock on the partially opened inner door. Second, he contends that Parker committed an additional violation by entering his home after he announced that he had a gun.
To support the first contention, Mr. Walker cites
United States v. Arellano-Ochoa,
Turning next to Deputy Parker’s entry into the house, we agree with Mr. Walker that the entry was a Fourth Amendment intrusion. To justify the entry, the government relies on the exigent-circumstances doctrine.
See United States v. Najar,
We agree with the district court that exigent circumstances supported the officers’ entry. When Deputy Parker knocked on the inner door, again announcing that he was from the Sheriffs office, Mr. Walker responded, “Yeah, and I got a goddamn gun.” R. Vol. Ill at 22 (emphasis omitted). This threatening remark justified the officers in taking prompt action to protect themselves. Although retreat was an alternative, it was also reasonable for them to take control óf the situation by entering to disarm Mr. Walker, who could otherwise continue to pose a danger to the officers and others. Because the officers could reasonably believe that they needed to enter Mr. Walker’s home to protect their own safety, and because they acted reasonably in entering and restraining Mr. Walker, we hold that the officers committed no Fourth Amendment violation in those actions.
*1254 B. Sweep of the House
Mr. Walker next argues that the warrantless sweep of his home after he had been handcuffed and removed to the porch also violated the Fourth Amendment. The district court justified the search as a “protective sweep” under
Maryland v. Buie,
This court has stated that a “protective sweep” of a residence to ensure officer safety may take place only incident to an arrest.
See United States v. Torres-Castro,
The sweep may nevertheless have been proper under the exigent-circumstances doctrine set out in
Najar,
On the other hand, the government argued in district court and maintains before us that the sweep of Mr. Walker’s home could be justified by the risk of danger to others, such as the person with whom Mr. Walker allegedly had been fighting. The district court did not address this potential justification for the sweep. We therefore remand for a determination whether the warrantless sweep of Mr. Walker’s home was permissible under the exigent-circumstances doctrine as it relates to victim safety.
See id.,
III. CONCLUSION
We REVERSE the judgment below and REMAND to the district court for consideration of whether exigent circumstances may have justified a search of Mr. Walker’s home as a sweep for potential victims.
