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MR. JUSTICE BRENNAN delivered the opinion of the Court.
We review in this case the validity of the proposition that there is under the Fourth Amendment a "distinction between merely evidentiary materials, on the one hand, which may not be seized either under the authority of a search warrant or during the course of a search incident to arrest, and on the other hand, those objects which may validly be seized including the instrumentalities and means by which a crime is committed, the fruits of crime such as stolen property, weapons by which escape of the person arrested might be effected, and property the possession of which is a crime."
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About 8 a. m. on March 17, 1962, an armed robber entered the business premises of the Diamond Cab Company in Baltimore, Maryland. He took some $363 and ran. Two cab drivers in the vicinity, attracted by shouts of "Holdup," followed the man to 2111 Cocoa Lane. One driver notified the company dispatcher by radio that the man was a Negro about 5'8' tall, wearing a light cap and dark jacket, and that he had entered the house on Cocoa Lane. The dispatcher relayed the information to police who were proceeding to the scene of the robbery. Within minutes, police arrived at the house in a number of patrol cars. An officer knocked and announced their presence. Mrs. Hayden answered, and the officers told her they believed that a robber had entered the house, and asked to search the house. She offered no objection.
The officers spread out through the first and second floors and the cellar in search of the robber. Hayden was found in an upstairs bedroom feigning sleep. He was arrested when the officers on the first floor and in the cellar reported that no other man was in the house. Meanwhile an officer was attracted to an adjoining bathroom by the noise of running water, and discovered a shotgun and a pistol in a flush tank; another officer who, according to the District Court, "was searching the cellar for a man or the money" found in a washing machine a jacket and trousers of the type the fleeing man was said to have worn. A clip of ammunition for the pistol and a cap were found under the mattress of Hayden's bed, and ammunition for the shotgun was found in a bureau drawer in Hayden's room. All these items of evidence were introduced against respondent at his trial.
We agree with the Court of Appeals that neither the entry without warrant to search for the robber, nor the search for him without warrant was invalid. Under the circumstances of this case, "the exigencies of the situation made that course imperative." McDonald v. United States, . . . The police were informed that an armed robbery had taken place, and that the suspect had entered 2111 Cocoa Lane less than five minutes before they reached it. They acted reasonably when they entered the house and began to search for a man of the description they had been given and for weapons which he had used in the robbery or might use against them. The Fourth Amendment does not require police officers to delay in the course of an investigation if to do so would gravely endanger their lives or the lives of others. Speed here was essential, and only a thorough search of the house for persons and weapons could have insured that Hayden was the only man present and that the police had control of all weapons which could be used against them or to effect an escape.
We do not rely upon Harris v. United States, supra, in sustaining the validity of the search. The principal issue in Harris was whether the search there could properly be regarded as incident to the lawful arrest, since Harris was in custody before the search was made and the evidence seized. Here, the seizures occurred prior to or immediately contemporaneous with Hayden's arrest, as part of an effort to find a suspected felon, armed, within the house into which he had run only minutes before the police arrived. The permissible scope of search must, therefore, at the least, be as broad as may reasonably be necessary to prevent the dangers that the suspect at large in the house may resist or escape.
It is argued that, while the weapons, ammunition, and cap may have been seized in the course of a search for weapons, the officer who seized the clothing was searching neither for the suspect nor for weapons when he looked into the washing machine in which he found the clothing. But even if we assume, although we do not decide, that the exigent circumstances in this case made lawful a search without warrant only for the suspect or his weapons, it cannot be said on this record that the officer who found the clothes in the washing machine was not searching for weapons. He testified that he was searching for the man or the money, but his failure to state explicitly that he was searching for weapons, in the absence of a specific question to that effect, can hardly be accorded controlling weight. He knew that the robber was armed and he did not know that some weapons had been found at the time he opened the machine. In these circumstances the inference that he was in fact also looking for weapons is fully justified.
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