HARLAN, J., dissenting. 374 U.S. the seaman of the jury trial he demanded, and he is entitled to relief from this error by having the kind of trial he would have had in the absence of error. MR. JUSTICE HARLAN, dissenting. Reversed. I am wholly in sympathy with the result reached by the Court. It is, I believe, a result that is consistent with sound judicial administration and that will greatly simplify the conduct of suits in which a claim for maintenance and cure is joined with a Jones Act claim arising out of the same set of facts. But the rule that the Court announces is in my view entirely procedural in character, and the manner in which such rules must be promulgated has been specified by Congress in 28 U. S. C. § 2073. This statute provides that rules of procedure in admiralty "shall not take effect until they have been reported to Congress by the Chief Justice at or after the beginning of a regular session thereof and until the expiration of ninety days after they have been thus reported." Believing that we are governed by this provision, and that the method there prescribed for the declaration of procedural rules, which are to be applicable in all Federal District Courts, is exclusive, I am unable to subscribe to the opinion of the Court.* I think the appropriate way to achieve what in this instance is obviously a desirable procedural reform is to deal with the matter through the Judicial Conference of the United States. Cf. Miner v. Atlass, 363 U. S. 641. Meanwhile, substantially for the reasons given in Judge Friendly's opinion, I consider that the judgment below must be affirmed. *The course taken by the Court is not, in my view, supported by any of the cases cited in note 12 of the Court's opinion. None of them involved a procedural rule. Syllabus. KER ET UX. v. CALIFORNIA. CERTIORARI TO THE DISTRICT COURT OF APPEAL OF No. 53. Argued December 11, 1962.-Decided June 10, 1963. 1. The prohibition of the Fourth Amendment against unreasonable searches and seizures, which forbids the Federal Government to convict a man of crime by using evidence obtained from him by unreasonable search and seizure, is enforceable against the States through the Fourteenth Amendment by the same sanction of exclusion and by the application of the same constitutional standard prohibiting "unreasonable searches and seizures," as defined in the Fourth Amendment. Mapp v. Ohio, 367 U. S. 643. Pp. 30-34. (a) This Court's long-established recognition that standards of reasonableness under the Fourth Amendment are not susceptible of Procrustean application is carried forward when that Amendment's proscriptions are enforced against the States through the Fourteenth Amendment. P. 33. (b) The reasonableness of a search is, in the first instance, a substantive determination to be made by the trial court from the facts and circumstances of the case and in the light of the "fundamental criteria" laid down by the Fourth Amendment and in the opinions of this Court applying that Amendment, as distinguished from the exercise of its supervisory powers over federal courts; but findings of reasonableness by a trial court are respected only insofar as they are consistent with federal constitutional guarantees. P. 33. (c) The States are not precluded from developing working rules governing arrests, searches and seizures to meet "the practical demands of effective criminal investigation and law enforcement," provided that those rules do not violate the constitutional proscription of unreasonable searches and seizures and the concomitant command that evidence so seized is inadmissible against one who has standing to complain. P. 34. 2. Having reason to believe that one of the petitioners was selling marijuana and had just purchased some from a person who was known to be a dealer in marijuana, California police officers, without a search warrant, used a passkey to enter the apartment occu Opinion of CLARK, J. 374 U.S. pied by petitioners, husband and wife, arrested them on suspicion of violating the State Narcotic Law, searched their apartment, and found three packages of marijuana, which they seized. At petitioners' trial, these packages of marijuana were admitted in evidence over petitioners' objection, and they were convicted. In affirming the convictions, the California District Court of Appeal found that there was probable cause for the arrests; that the entry into the apartment was for the purpose of arrest and was not unlawful; and that the search, being incident to the arrests, was likewise lawful and its fruits admissible in evidence against petitioners. Held: The judgment is affirmed. Pp. 34-44. 195 Cal. App. 2d 246, 15 Cal. Rptr. 767, affirmed. Robert W. Stanley argued the cause and filed a brief for petitioners. Gordon Ringer, Deputy Attorney General of California, argued the cause for respondent. With him on the brief were Stanley Mosk, Attorney General, and William E. James, Assistant Attorney General. A. L. Wirin, Fred Okrand and Paul Cooksey filed a brief for the American Civil Liberties Union of Southern California, as amicus curiae, urging reversal. MR. JUSTICE CLARK delivered the opinion of the Court with reference to the standard by which state searches and seizures must be evaluated (Part I), together with an opinion applying that standard, in which MR. JUSTICE BLACK, MR. JUSTICE STEWART and MR. JUSTICE WHITE join (Parts II-V), and announced the judgment of the Court. This case raises search and seizure questions under the rule of Mapp v. Ohio, 367 U. S. 643 (1961). Petitioners, husband and wife, were convicted of possession of marijuana in violation of § 11530 of the California Health and Safety Code. The California District Court of Appeal affirmed, 195 Cal. App. 2d 246, 15 Cal. Rptr. 767, despite the contention of petitioners that their arrests in their 223 23 Opinion of CLARK, J. apartment without warrants lacked probable cause1 and the evidence seized incident thereto and introduced at their trial was therefore inadmissible. The California Supreme Court denied without opinion a petition for hearing. This being the first case arriving here since our opinion in Mapp which would afford suitable opportunity for further explication of that holding in the light of intervening experience, we granted certiorari. 368 U. S. 974. We affirm the judgment before us. The state courts' conviction and affirmance are based on these events, which culminated in the petitioners' arrests. Sergeant Cook of the Los Angeles County Sheriff's Office, in negotiating the purchase of marijuana from one Terrhagen, accompanied him to a bowling alley about 7 p. m. on July 26, 1960, where they were to meet Terrhagen's "connection." Terrhagen went inside and returned shortly, pointing to a 1946 DeSoto as his "connection's" automobile and explaining that they were to meet him "up by the oil fields" near Fairfax and Slauson Avenues in Los Angeles. As they neared that location, Terrhagen again pointed out the DeSoto traveling ahead of them, stating that the "connection" kept his supply of narcotics "somewhere up in the hills." They parked near some vacant fields in the vicinity of the intersection. of Fairfax and Slauson, and, shortly thereafter, the DeSoto reappeared and pulled up beside them. The deputy then recognized the driver as one Roland Murphy, whose "mug" photograph he had seen and whom he knew from other narcotics officers to be a large-scale seller of marijuana currently out on bail in connection with narcotics charges. 1 This contention was initially raised prior to the trial. Section 995, California Penal Code, provides for a motion to set aside the information on the ground that the defendant has been committed without probable cause. Evidence on that issue was presented out of the presence of the jury, and, following the court's denial of the motion, the petitioners were tried and convicted by the jury. Opinion of CLARK, J. 374 U.S. Terrhagen entered the DeSoto and drove off toward the oil fields with Murphy, while the Sergeant waited. They returned shortly, Terrhagen left Murphy's car carrying a package of marijuana and entered his own vehicle, and they drove to Terrhagen's residence. There Terrhagen cut one pound of marijuana and gave it to Sergeant Cook, who had previously paid him. The Sergeant later reported this occurrence to Los Angeles County Officers Berman and Warthen, the latter of whom had observed the occurrences as well. On the following day, July 27, Murphy was placed under surveillance. Officer Warthen, who had observed the Terrhagen-Murphy episode the previous night, and Officer Markman were assigned this duty. At about 7 p. m. that evening they followed Murphy's DeSoto as he drove to the same bowling alley in which he had met Terrhagen on the previous evening. Murphy went inside, emerged in about 10 minutes and drove to a house where he made a brief visit. The officers continued to follow him but, upon losing sight of his vehicle, proceeded to the vicinity of Fairfax and Slauson Avenues where they parked. There, immediately across the street from the location at which Terrhagen and Sergeant Cook had met Murphy on the previous evening, the officers observed a parked automobile whose lone occupant they later determined to be the petitioner George Douglas Ker. The officers then saw Murphy drive past them. They followed him but lost sight of him when he extinguished his lights and entered the oil fields. The officers returned to their vantage point and, shortly thereafter, observed Murphy return and park behind Ker. From their location approximately 1,000 feet from the two vehicles, they watched through field glasses. Murphy was seen leaving his DeSoto and walking up to the driver's side of Ker's car, where he “appeared to have conversation with him." It was shortly before 9 p. m. and the distance in the |