The State may prove either actual possession or constructive possession. Scrafford v. State, 414 So.2d 179 (Ala.Cr.App. 1982). In United States v. Harris, 733 F.2d 994 (2d Cir. 1984), Harris acted as a broker for a potential seller and a potential buyer.

However, a witness cannot be impeached by proof of contradictory statements made by him, whether oral or in writing, without first asking him whether he made such declarations, specifying with reasonable certainty the time when, the place where, the person to whom such statement was made and the substance of such statement. Scrafford v. State, 414 So.2d 179 (Ala.Cr.App. 1982); Junior v. State, 411 So.2d 850 (Ala.Cr.App. 1982); Starling v. State, 398 So.2d 337 (Ala.Cr.App.), writ denied, 398 So.2d 342 (Ala. 1981); Walker v. State, 369 So.2d 814 (Ala.Cr.App. 1978), reversed, 369 So.2d 825 (Ala. 1979), on remand, 369 So.2d 826 (Ala.Cr.App. 1979); Gamble, McElroy's Alabama Evidence, § 157.01 (1) (3rd Ed. 1977).