Phillip Rideout and Ronald Perry seek prohibition restraining the Santa Clara County Superior Court from taking any further action upon an information charging them with transportation of marijuana (Health & Saf. Code, §11531).

Following a preliminary hearing on the charge the committing magistrate held petitioners to answer. The information was filed, and a motion to set it aside on the ground they were committed without probable cause (Pen. Code, § 995) was denied. Petitioners thereafter filed the instant petition for prohibition based on the same ground (Pen. Code, § 999a).

The sole witness for the People at the preliminary hearing was Police Officer Bernard Hazen, who testified to the following effect:

About 1 p.m. on January 5, 1967, Officer Hazen observed a ear being driven with a defective license plate light. He flashed his red light to direct the car to stop and pulled over behind it. The driver emerged without being asked to do so, met the officer in front of the police car, and identified himself as George Oliver. 1

The officer walked over to the car Oliver had been driving to check its registration and to obtain identification from the passengers. One Lopez was sitting on the front seat, and petitioners were on the back seat. The officer ascertained that the car was registered to Oliver’s father. While checking the registration, the officer noticed several speakers and stereo tapes inside the ear. Since he had information that such items had been stolen, he asked permission to search the ear, and Oliver replied, ‘ ‘ Go right ahead. ’ ’ 2

On the floor in front of the back seat the officer observed a matchbook folded in “a circular formation.” He recognized it as a “crutch,” a device “used to hold the used end of marijuana cigarettes.” There were no bum marks on the “crutch,” but the officer presumed it had been used because matchbooks ordinarily are not folded in that manner. The *474 officer looked into the "well” of the car behind the back seat where a convertible top folds down and saw "in plain view” a Tareyton cigarette package, which appeared to contain marijuana. [It was stipulated that the substance was marijuana.] The officer asked Oliver whom the package belonged to, and Oliver "did not state.” No marijuana odor was detected in the car.

Evidence that will justify a prosecution need not be sufficient to support a conviction. (Lorenson v. Superior Court, 35 Cal.2d 49, 56 [ 216 P.2d 859 ] ; People v. Willmirth, 247 Cal.App.2d 513, 514 [ 55 Cal.Rptr. 678 ] ; see People v. McRae, 31 Cal.2d 184, 187 [ 187 P.2d 741 ].) " ‘Probable cause is shown if a man of ordinary caution or prudence would be led to believe and conscientiously entertain a strong suspicion of the guilt of the accused. ’ ” (Jackson v. Superior Court, 62 Cal.2d 521, 525 [ 42 Cal.Rptr. 838 , 399 P.2d 374 ] ; Robison v. Superior Court, 49 Cal.2d 186, 188 [ 316 P.2d 1 ] ; Lorenson v. Superior Court, supra, at p. 56.) An information will not be set aside or a prosecution thereon prohibited if there is some rational ground for assuming the possibility that an offense has been committed and the accused is guilty of it. (De Mond v. Superior Court, supra, 57 Cal.2d 340 , 344 ; cf. Jackson v. Superior Court, supra, at p. 525 ; People v. Crosby, 58 Cal.2d 713, 719 [ 25 Cal.Rptr. 847 , 375 P.2d 839 ].)

A reviewing court may not substitute its judgment as to the weight of the evidence for that of the magistrate, and, if there is some evidence to support the information, the court will not inquire into its sufficiency. (Perry v. Superior Court, 57 Cal.2d 276, 283 [ 19 Cal.Rptr. 1 , 368 P.2d 529 ] ; People v. Jablon, 153 Cal.App.2d 456, 459 [ 314 P.2d 824 ] ; cf. Jackson v. Superior Court, supra, at p. 525.) Every legitimate inference that may be drawn from the evidence must be drawn in favor of the information. (People v. Cron, 207 Cal.App.2d 452, 457 [ 24 Cal.Rptr. 586 ] ; cf. Jackson v. Superior Court, supra, at p. 530.)

A defendant who has joint or exclusive possession of narcotics in a moving vehicle may be found guilty of unlawful transportation of narcotics. (People v. Miller, 162 Cal.App.2d 96, 98 [ 328 P.2d 506 ] ; People v. Holliday, 120 Cal.App.2d 562, 564 [ 261 P.2d 301 ] ; People v. Coleman, 100 Cal.App.2d 797, 801 [ 224 P.2d 837 ].) Knowledge by the defendant of both the presence of the drug and its narcotic character is essential to establish unlawful transportation, sale, or possession of narcotics. (People v. Groom, 60 Cal.2d 694, 696 [ 36 Cal.Rptr. 327 , *475 388 P.2d 359 ] ; People v. Redrick, 55 Cal.2d 282, 285 [ 10 Cal.Rptr. 823 , 359 P.2d 255 ] ; People v. Roberts, 228 Cal.App.2d 722, 726 [ 39 Cal.Rptr. 843 ] ; People v. Tostado, 217 Cal.App.2d 713, 719-720 [ 32 Cal.Rptr. 178 ] ; People v. Sanders, 163 Cal.App.2d 132, 135 [ 328 P.2d 825 ] ; People v. Watkins, 96 Cal.App.2d 74, 77 [ 214 P.2d 414 ] ; see 2 Within, Cal. Crimes (1963) pp. 632-637, 642-644.) Such knowledge may be shown by circumstantial evidence. (People v. Groom, supra, at p. 530 .)

In the present case from the recited evidence the magistrate could reasonably have inferred that petitioners had possession of the marijuana and knowledge of its presence since they were the ones in closest proximity to the place where it was found, the place apparently was accessible to them, and they had an opportunity to deposit the marijuana there when the police directed the car in which they were riding to pull over. Likewise an inference of their knowledge of the narcotic character of the marijuana is warranted by the evidence of the presence of the “crutch” on the floor in front of the back seat where petitioners were sitting (cf. People v. Young, 197 Cal.App.2d 129, 131 [ 17 Cal.Rptr. 283 ]) and the secretion of the marijuana in an ordinary package of cigarettes (cf. People v. Powell, 236 Cal.App.2d 881, 884 [ 46 Cal.Rptr. 415 ]).

Petitioners rely upon People v. Redrick, supra, 55 Cal.2d 282, 285 , and People v. Jackson, 198 Cal.App.2d 698, 705 [ 18 Cal.Rptr. 214 ], neither of which involved the question of probable cause. The cited cases, which affirmed judgments of conviction of possession of narcotics, state that “proof of opportunity of access to a place where narcotics are found, without more, will not support a finding of unlawful possession.” In the present case, however, the question is not whether the evidence will support a finding but whether there is probable, cause, and here petitioners not only had an opportunity of access to the place where the marijuana was found, but they were the ones in closest proximity to that place and the '‘ crutch ’ ’ was at their feet.

Other authority cited by petitioners likewise does not aid them. For example, People v. Howard, 58 Cal.App. 340 . 344345 [ 208 P. 1022 ], held that the mere presence of guests on the premises where stolen property is found is insufficient to justify their conviction for larceny.

The alternative writ heretofore issued is discharged and the peremptory writ is denied.

*476 Traynor, C. J., McComb, J., and Mosk, J., concurred.

Oliver was also charged with the offense in question, but he is not a party to the instant proceeding.

Oliver denied having given permission to search. The credibility of witnesses at the preliminary hearing is, of course, a question of fact within the province of the committing magistrate to determine. (De Mond v. Superior Court, 57 Cal.2d 340, 345 [ 19 Cal.Rptr. 313 , 368 P.2d 865 ] ; People v. Brown, 205 Cal.App.2d 188, 192-193 [ 22 Cal.Rptr. 835 ].)