OPINION
ROBERTS, Judge.This is an appeal from a conviction for the possession of marihuana. A jury found appellant guilty and the court assessed his punishment at five years’ probation. The offense occurred on February 8, 1974 and trial commenced on October 22, 1974.
Officers Franks and Holloway of the Houston Police Department stopped appellant and a passenger in their car on an access road to the Gulf Freeway around *211:00 on the night in question. Both officers testified that their attention was drawn to appellant’s vehicle by the fact that it was driving slowly and bore out-of-county tags, and by the fact that the people in the car seemed “cautious” or “conscious” of the officers’ proximity to them. They testified that they stopped the car to cheek the operator’s license and to see if the car was stolen; the operator’s license was checked as a matter of routine and the only cause the officers had to believe the vehicle was stolen was a “hunch.”
Appellant and Officer Franks both got out of their vehicles and met between them, at which time appellant produced a valid Texas operator’s license upon request. At the same time, Officer Holloway walked around appellant’s vehicle and ascertained that it bore a valid inspection sticker. He then shined his flashlight into the automobile and spotted a pistol in plain view on the floorboard. A search of the appellant, the passenger, and the automobile revealed some live rounds of .45 caliber ammunition, some white powder, some pills, and a large sum of money. The officers were unable to open the trunk. Appellant and his passenger were arrested and a wrecker was summoned to tow the car away.
The automobile was left outside the gates of a private salvage yard where the proprietor discovered it the next morning. He testified that the trunk popped open when he attempted to tow the car into the yard. In the trunk, he saw four or five pounds of marihuana. A passing motorcycle policeman was flagged down and turned the material over to the narcotics division.
Appellant challenges the legality of his initial arrest and search, and thus the admissibility of the marihuana found at the end of the chain of events which followed. He filed a motion to suppress prior to trial and his objection to the admission of the evidence during trial was overruled. If the initial arrest was invalid, the marihuana later found would be subject to suppression under the “fruit of the poisonous tree” doctrine of Wong Sun v. United States, 371 U.S. 471, 83 S.Ct. 407, 9 L.Ed.2d 441 (1963).
The initial stop of appellant and his passenger was not justified by probable cause to believe that any crime had been or was being committed. The officers saw no evidence of any traffic offenses. The inarticulate hunch, suspicion, or good faith of the officer in suspecting the car to be stolen was insufficient to constitute probable cause for an arrest, or even a temporary detention. Talbert v. State, 489 S.W.2d 309 (Tex.Cr.App.1973); Brown v. State, 481 S.W.2d 106 (Tex.Cr.App.1973). The out-of-county tags and slow driving of the appellant were not evidence of any wrongdoing. And the “caution” of the car’s occupants in the presence of the police officers did not rise to the level of probable cause, either. Wilson v. State, 511 S.W.2d 531 (Tex.Cr.App.1974); Brown v. State, 481 S.W.2d 106, 112 (Tex.Cr.App.1972).
However, Texas law does give peace officers the right to stop and detain motorists for the limited purpose of checking their operators’ licenses. Leonard v. State, 496 S.W.2d 576 (Tex.Cr.App.1973); Black v. State, 491 S.W.2d 428 (Tex.Cr.App.1973). Section 13 of Art. 6687b, V.A.C.S. provides in part, “. . . Any peace officer may stop and detain any motor vehicle operator for the purpose of determining whether such person has an operator’s license as required by this Section.” This provision does not authorize fishing expeditions, however. Pruitt v. State, 389 S.W.2d 475 (Tex.Cr.App.1965), overruled on other grounds in Onofre v. State, 474 S.W.2d 699 (Tex.Cr.App.1972).
The question then becomes: What was the reason for the stop of appellant’s vehicle? There was extensive testimony from both officers on this question both at the hearing on the motion to suppress and at the trial. Although the operator’s license check was advanced as one reason for the detention, it was explained that this was merely a matter of routine in all such situations. The real reason for the stopping of appellant’s automobile would appear to have been its out-of-county tags and the slow, “cautious” driving of its driver. Offi*3cer Franks, who made the decision to stop appellant, testified as follows:
“Q (by Mr. Blaine) You stopped him because he was driving fifteen or twenty miles per hour and he seemed to be conscious of your presence and the license plates on the car were from some other county?
“A Yes sir.
“Q That’s the only reason you stopped him?
“A Yes sir.
* * * * * *
“Q You were the one that decided first to stop the vehicle?
“A Yes sir.
“Q Am I correct on the reasons you were going to stop it?
“A We were going to see if the plates were stolen or the car was stolen and check his driver’s license.
“Q If he had been driving at thirty or thirty five miles per hour and had not seemed to be conscious of your presence and he had had Harris County license plates, then you would not have stopped him to check his driver’s license?
“A Probably not.”
In the case of Hall v. State, 488 S.W.2d 788 (Tex.Cr.App.1973), a police officer stopped the defendant for failure to signal a right turn and discovered a gun under the driver’s seat. After holding the traffic arrest invalid, this Court noted that the defendant’s detention could not be justified under Sec. 13 of Art. 6687b, V.A.C.S., either. When the arresting officer in that case was asked if he would have stopped the defendant for a license check if the defendant had continued in a normal manner without apparently violating any laws, the officer replied, “I doubt very seriously that I would have.”
Even if it could be said that appellant’s detention was justified on the basis of Art. 6687b, Sec. 13, V.A.C.S., the officers’ subsequent actions further infringed on appellant’s rights under our state and federal constitutions. A New Mexico officer used a statute very similar to See. 13 of Art. 6687b in stopping a man and searching the trunk of his car in State v. Bloom, 19 Cr.L. 2060 (N.Mex.App., March 16, 1976). The court there said that the officer could not use such a regulatory statute as an excuse to check out his suspicions. “However, the actions of the police must be in conformity with the constitutional requirements of the Fourth Amendment. See Carroll v. U.S., 267 U.S. 132, [45 S.Ct. 280, 69 L.Ed. 543], U.S. v. Jenkins, 528 F.2d 713 (10th Cir. 1975). When the detention permitted by the statute becomes a mere subterfuge or excuse for some other purpose which would not be lawful the actions then become unreasonable and fail to meet the constitutional requirement. Murphy v. State, 194 Tenn. 698, 254 S.W.2d 979.”
The reasons given for the police officer’s detention of the defendant in Pruitt, supra, were likewise suspect, although the operator’s license check was given as one of them. This Court wrote,
“Assuming however, that the patrolman did stop appellant to check his driver’s license, then the patrolman had no right to make a search as incident to this stopping . . . . Here, the appellant had in his possession and presented to the officer a valid, unexpired driver’s license. This finding terminated the patrolman’s responsibility in this matter.”
The search condemned in Pruitt was the mere shining of a flashlight in the back seat of defendant’s automobile. The light revealed a case of wine which would have been in plain view in the daylight. Onofre v. State, supra, overruled Pruitt to this extent, stating that, “The plain view rule does not go into hibernation at sunset.” But Pruitt’s discussion of the limitations on the scope of an investigation based on an operator’s license check remain valid, as the discussion in Marshall v. United States, 422 F.2d 185, 189 (5th Cir. 1970) makes clear.
As in the cases of Pruitt, supra, and Bloom, supra, there is much testimony in the instant case that the officers’ detention of appellant was for more than just a rou*4tine license check. Even giving them the benefit of this doubt, however, it appears that their investigation here went beyond the purposes which justified its initiation.
In this case, the purpose of the detention was strictly limited by Art. 6687b, Sec. 13, V.A.C.S., and was accomplished when Officer Franks was shown the valid operator’s license. Officer Holloway’s examination of the inspection sticker and the interior of the car clearly went beyond the purpose for which the stop was made. (Art. 6701d, Sec. 140, V.A.C.S., concerning inspection stickers, does not permit detention as does Art. 6687b, Sec. 13). The scope of an investigation cannot exceed the purposes which justified its initiation. Maldonado v. State, 528 S.W.2d 234 (Tex.Cr.App.1975).
The case of Black v. State, supra, involved a similar expansion of the scope of Art. 6687b when the detaining officer, after ascertaining the driver’s possession of a valid license, went looking in the car for registration papers. The sight of a pistol in plain view and the subsequent discovery of marihuana were beyond the purpose of the initial investigation. This Court’s holding to the contrary in Black v. State, supra, is overruled.
Likewise the officers’ investigation went beyond that authorized by Art. 6687b in this case. The discovery of the pistol and subsequent events were therefore “fruits of the poisonous tree.” Wong Sun v. United States, supra.
For these reasons, the judgment is reversed and the cause remanded.
DOUGLAS, J., dissents.