Defendant appeals from his conviction upon a jury verdict that he possessed non-tax-paid whiskey in violation of 26 U.S.C. §§ 5205(a), 5604(a). The only question raised by this appeal is the admissibility, at defendant’s trial, of certain jugs of moonshine whiskey, together with testimony concerning their discovery, found in a truck parked on defendant’s property near his residence by Agent Williams of the Alcohol, Tobacco and Firearms Division of the United States Treasury Department. On the basis of Agent Williams’ testimony concerning events leading up to this war-rantless discovery and seizure, the trial *1099judge overruled defendant’s objection to admissibility based on the fourth amendment. The government contends that the circumstances of Agent Williams’ discovery and seizure fell within either of both of two recognized exceptions to the prohibition against warrantless searches — “seizure of evidence within plain view” or “automobile search.” We disagree, and we reverse the judgment and grant a new trial, if the government be advised.
I.
On November 16, 1972, at approximately 1:30 p. m., Agent Williams and a state enforcement officer were taken to the vicinity of defendant’s residence by a second state enforcement officer who then drove off. Agent Williams and his companion nevertheless remained in radio contact with the other officer in the vehicle. Defendant had a reputation, known to Agent Williams, of being a moonshiner, and the purpose of the visit was to search the fields adjacent to defendant’s property for a still. The only access to defendant’s residence was an old road about a quarter mile in length that came to an end in his front yard. During their search of the adjacent fields, the officers observed three vehicles parked near defendant’s residence, including the one from which the liquor was later seized. A fourth vehicle was seen by the side of the access road, beyond the limits of defendant’s property and apparently abandoned.
Upon approaching the fourth vehicle, the officers detected the aroma of moonshine whiskey emanating therefrom. When their search for a still proved futile, the officers decided to leave in order to prepare for a stake-out of the abandoned vehicle. Agent Williams summoned the officer in the vehicle by radio to pick them up at a certain spot. As they were walking to the pickup point, the defendant drove by them in his pickup truck proceeding in the direction of his house. The officers made an unsuccessful effort to conceal themselves. Agent Williams, who had known defendant for fifteen or sixteen years, was certain that defendant had recognized him. Defendant parked his vehicle near his residence and left, but the officers were unable to determine whether he entered the house or took to the nearby fields.
As a result of this encounter, the officers decided they could not leave the scene without a substantial risk that defendant, alerted to their presence, might remove any contraband or evidence that might be contained in the abandoned car. After the third officer arrived in his car, they decided to go up to defendant’s house, summon him to the door and ask him what connection, if any, he had with the abandoned car as a preliminary to searching it. Agent Wil.liams and the others then drove to defendant’s residence.
Agent Williams’ attempts to summon defendant to the front door were interrupted by the arrival of two men in a truck carrying bran — a usual ingredient in the manufacture of moonshine whiskey. After a short discussion with the officers, the two men drove off and Agent Williams resumed knocking at the front door, calling defendant by name.
Failing to obtain a response, Agent Williams decided to try the back door. En route to the rear of the house, he passed a 1952 Ford truck parked near the building. It was approximately a ton and a half in size with sideboards and swinging doors in the rear which were closed. This meant that whatever may have been resting on the bed of the truck could not have been detected by the casual glance of a passer-by. When Williams got near this truck, he noticed that it exuded a strong odor of moonshine whiskey. Agent Williams’ ability to identify the odor of moonshine whiskey is not in dispute.
Agent Williams then “stopped at the rear of the truck” and “looked through a kind of crack in the back swinging doors” — this crack was a space between the edges of the doors which did not fit *1100together snugly when closed. Through this crack Agent Williams observed a large quantity of one gallon plastic jugs containing a white liquid. He then entered the truck, ascertained that the jugs contained moonshine liquor and seized them. He, of course, did not have a warrant for the search or the seizure.
II.
It is commonplace learning that warrantless searches and seizures are unreasonable within the meaning of the fourth amendment unless they fit within certain carefully defined classes of cases. Cady v. Dombrowski, 413 U.S. 433, 93 S.Ct. 2523, 37 L.Ed.2d 706 (1973); Camara v. Municipal Court, 387 U.S. 523, 528-529, 87 S.Ct. 1727, 18 L.Ed.2d 930 (1967). And so we turn to the “plain view” exception to the prohibition against warrantless searches urged on us by the government.
The most recent exposition by the Supreme Court of the “plain view” exception can be found in the plurality opinion in Coolidge v. New Hampshire, 403 U.S. 443, 91 S.Ct. 2022, 29 L.Ed.2d 564 (1971). There, two prerequisites to the availability of the exception were prescribed.
First, the officer’s presence at the vantage point from which he discovers the evidence in plain view must not amount to an unjustifiable intrusion into an area with respect to which defendant's expectations of privacy are protected by the fourth amendment. That is, the officer must not have entered defendant’s zone of privacy, or, if he has, such entry must have been justified by “a warrant for another object, hot pursuit, search incident to lawful arrest, or some other legitimate reason for being present unconnected with a search directed against the accused.” 403 U.S. at 466, 91 S.Ct. at 2038. Secondly, the discovery of the evidence in plain view must have been inadvertent.
The rationale underlying this exception is that the abuses which the fourth amendment warrant requirement is designed to prevent are satisfactorily dealt with by the requirement that the original intrusion be constitutionally justifiable. In consequence, it would be needlessly inconvenient, and sometimes perhaps a danger to the police or to the evidence, to require the police to ignore evidence in plain view until they have obtained a warrant particularly describing it. 403 U.S. at 467-468, 91 S.Ct. 2022.
Turning now to the application of these principles to the facts of the instant appeal, we conclude that the agents entered an area with respect to which the defendant had a reasonable expectation of privacy protected by the. fourth amendment when they came onto his premises. However, the agents had a legitimate reason for this incursion unconnected with a search of such premises directed against the accused. They were clearly entitled to go onto defendant’s premises in order to question him concerning the abandoned vehicle near his property.1 Furthermore, we cannot say that Agent Williams exceeded the scope of his legitimate purpose for being there by walking around to the back door when he was unable to get an answer at the front door.
It follows that Agent Williams got within smelling range of the truck in which the liquor was found without unjustifiably intruding into defendant’s fourth amendment zone of privacy. Had he “discovered” the liquor at this point, the plain view doctrine would be applicable to its seizure. However, Agent Williams did not “discover” the liquor until he actually saw it through the crack be*1101tween the rear doors of the truck. The liquor was certainly not in “plain view,” within the ordinary meaning of that phrase, when Agent Williams first detected the odor emanating from the truck. Nor did he, at that point, have any basis upon which to conclude, with certainty, that liquor was actually present in the truck. An alternative explanation of the smell was equally probable — that liquor had once been present in the truck but had since been removed leaving the truck permeated with its vapors. Agent Williams thus had no more than a reasonable ground to infer the presence of liquor at this point. A further visual observation was necessary to confirm the hypothesis.
It was not possible for Agent Williams to make this confirmatory observation without exceeding the original purpose of his intrusion, which had justified his presence on defendant’s property up to that point, and making a further intrusion into an area of protected privacy. Objects lying on the bed of the truck could not be seen except by someone who took special pains to look through the crack. The truck was parked on defendant’s property very near to his .residence. Under such circumstances, the defendant had a reasonable expectation that the contents of his truck would remain unknown to the general public.2 Thus, we believe that when Agent Williams looked through the crack between the closed rear doors of the truck, he “searched” the truck within the meaning of the fourth amendment.
We hold that where, in the course of an initially justifiable intrusion, an officer discovers facts which give him reason to believe that evidence of crime will be found by a further intrusion beyond the scope of the original intrusion, the “plain view” doctrine is inapplicable unless there is independent justification for such further intrusion.3 Since it was a search directed against the defendant, we must examine whether the “automobile search” doctrine validates Agent Williams’ further intrusion of looking through the crack between the doors of the truck.
III.
It is established that under certain circumstances, an officer, having probable cause to believe that an automobile contains evidence of the commission of a crime, may search that automobile for such evidence without first obtaining a warrant. Carroll v. United States, 267 U.S. 132, 45 S.Ct. 280, 69 L.Ed. 543 (1925); Chambers v. Maroney, 399 U.S. 42, 90 S.Ct. 1975, 26 L.Ed.2d 419 (1970); Gomori v. United States, 437 F.2d 312 (4 Cir. 1971). We have no doubt that, at the point at which Agent Williams smelled the distinctive odor of moonshine whiskey emanating from the truck, he had probable cause to believe that the truck contained contraband. Taken together with defendant’s known *1102reputation as a moonshiner and the presence at the scene, moments earlier, of two individuals in a vehicle carrying one of the raw materials of a distilling operation, Agent Williams’ detection of the odor of moonshine amounted to probable cause for the belief that moonshine was to be found in the truck.
But here again, the lack of a clear majority in Coolidge makes difficult a decision as to the exact scope of the doctrine that a warrantless search of an automobile may be made upon probable cause. In Coolidge v. New Hampshire, supra, a plurality of the Supreme Court found the Chambers/Carroll doctrine inapplicable to a certain seizure of an automobile because
. . . there is nothing in this case to invoke the meaning and purpose of the rule of Carroll v. United States— no alerted criminal bent on flight, no fleeting opportunity on an open highway after a hazardous chase, no contraband or stolen goods or weapons, no confederates waiting to move the evidence, not even the inconvenience of a special police detail to guard the immobilized automobile. In short, by no possible stretch of the legal imagination can this be made into a case where “it is not practicable to secure a warrant.” 403 U.S. at 462, 91 S.Ct. at 2035.
Elsewhere the plurality explained that the automobile exception was a specific instance of the doctrine of “exigent circumstances” justifying a warrantless search:
As we said in Chambers “exigent circumstances” justify the warrantless search of “an automobile stopped on the highway,” where there is probable cause, because the car is “movable, the occupants are alerted, and the car’s contents may never be found again if a warrant must be obtained.” “[T]he opportunity to search is fleeting . . .” 403 U.S. at 460, 91 S.Ct. at 2035 (emphasis supplied by the Coolidge plurality.)
If we could accept as fully authoritative the plurality opinion in Coolidge, reversal clearly would be required. Of the specific factors tending to justify a war-rantless search of an automobile enumerated by the plurality, only two are present here — the object of the search was contraband and the guarding of the truck by two of the officers while the third went to obtain a warrant would have involved some inconvenience. But, absent entirely from this situation are any of the facts indicating risk of loss of evidence. We doubt that the plurality in Coolidge regarded the two factors present here alone as determinative. In the first place, the inconvenience of standing guard over a vehicle while another officer obtains a warrant is likely to be present in most automobile searches.4 It is unlikely that the plurality thought that they were authorizing warrantless searches in such a large proportion of possible cases, particularly since it is clear that their conception of the rationale underlying the exception is based on the risk of loss of evidence. Secondly, we do not believe that the plurality intended to place determinative significance upon the distinction between “contraband” and “mere evidence” that had been categorically rejected in Warden v. Hayden, 387 U.S. 294, 87 S. Ct. 1642, 18 L.Ed.2d 782 (1967).5
There is, however, substantial doubt concerning whether the Coolidge plurality’s apparent view that the “automobile exception” is limited to circumstances where the obtaining of a warrant would risk loss of evidence is any longer a correct statement of the law. In applying Coolidge, courts other than the Supreme *1103Court have sustained warrantless searches of automobiles under circumstances where the only factor that could possibly have militated against imposition of the warrant required is the inconvenience of posting a guard over the vehicle while someone is sent to obtain a warrant. People v. Bukoski, 41 Mich. App. 498, 200 N.W.2d 373 (1972); People v. Dumas, 9 Cal.3d 871, 109 Cal.Rptr. 304, 512 P.2d 1208 (1973); United States v. Bozada, 473 F.2d 389 (8 Cir. 1973); United States v. Connolly, 479 F.2d 930 (9 Cir. 1973).6 The Connally case flatly holds that the inconvenience of posting a guard is an “exigent circumstance” that justifies dispensing with the warrant requirement. The Do-rnas “case explains its result in terms of the less intense expectation of privacy that attaches to automobiles when compared with personal residences. Such reduced expectation of privacy justifies dispensing with the warrant requirement when there is probable cause.
Furthermore, the Supreme Court has recently stated that, in addition to the risk of loss of evidence, the extensive and often non-criminal contact with automobiles that state enforcement officials have in the course of the performance of their duties justifies treating automobiles differently from houses for purposes of the warrant requirement. Cady v. Dombrowski, 413 U.S. at 439, 93 S.Ct. at 2527. Although this new element in the rationale for the “automobile exception” would not, on its face, appear to apply to searches for evidence of a federal crime conducted by federal officers, the decision in Cady v. Dom-browski suggests that the rationale for the exception is somewhat in a state of flux.
Prior to the dissents in Coolidge and the decision in Cady, the scope of the automobile exception seemed to be carefully defined to require the presence of circumstances indicating the risk of loss of evidence. Certainly, that is the only fair reading of th&_, Carroll-Chambers-Coolidge line of eases. We are not persuaded that this line of cases has been abandoned or overruled. Therefore, we are constrained to conclude that this search was invalid.7 We are particularly persuaded where, as here, the vehicle is parked on defendant’s property, a circumstance, we believe, which enhances the defendant’s expectation of privacy with respect to its contents.
To summarize, we hold that, since two of the agents could have guarded the *1104truck smelling of moonshine whiskey while the third obtained a warrant without significant risk of loss of evidence, the search and seizure in this case violated the fourth amendment and that the fruits thereof should have been suppressed.
For these reasons, we reverse the judgment of conviction against defendant. On the present record, there is lacking evidence legally sufficient to convict defendant if the search, the seizure and testimony with respect to them are excluded. We do not know, however, whether the government has available other evidence of guilt not sought to be used at this trial. In reversing, we therefore grant the government the right to try defendant anew, if it be so advised.
Reversed: new trial granted.