Defendant’s first contention on appeal is that the trial court erred in trying defendants for this count of armed robbery when defendants had been previously found guilty of another armed robbery which occurred at the same time and place.
*55 [1] It is well-settled that the “same act may constitute two or more offenses which are distinct from each other” and that in such cases “the accused may be separately prosecuted and punished for each.” 1 Wharton’s Criminal Law, § 394, pp. 537-8. See State v. Nash, 86 N.C. 650; State v. Gibson, 170 N.C. 697, 86 S.E. 774.
The defendants were charged on three counts of robbery, all of which occurred at the same time and place. In a trial on 12 November 1973, defendants were found guilty of armed robbery of James Frye. Now the defendants are being tried for the armed robbery of Jimmy Dunn. The second indictment under which defendants are now being tried is identical to the first except for the victim and the property taken.
The discussion of this contention of double jeopardy presents two questions: (1) whether the “same evidence” rule can be applied to show double jeopardy and (2) whether the acts of armed robbery do constitute the “same offense.”
[2] The same evidence test is defined in State v. Hicks, 233 N.C. 511, 516, 64 S.E. 2d 871, 875, as follows: “Whether the facts alleged in the second indictment, if given in evidence, would have sustained a conviction under the first indictment [citations], or whether the same evidence would support, a conviction in each case [citations].”
When applying this test to the case at bar, we find that the same evidence would not support a conviction in each case. Evidence of a robbery of property from the first victim will not support a conviction of a robbery of different property from a different victim. This is analogous to the situation in Hicks, wherein Justice Ervin wrote that evidence of conspiracy to damage or injure property owned or used by the Duke Power Company would not support a conviction of a conspiracy to damage or injure property owned or used by Jefferson Standard Broadcasting Company. State v. Hicks, supra, at 517, 64 S.E. 2d at 875.
In State v. Ballard, 280 N.C. 579, 186 S.E. 2d 372, the Supreme Court applied the same evidence test and determined that defendants had been twice put in jeopardy. That case is. distinguishable from the case at bar.
In Ballard, the rationale was that “ . . . when the lives of all employees in a store are threatened and endangered by the *56use or threatened use of a firearm incident to the theft of their employer’s money or property, a single robbery with firearms is committed.” State v. Potter, 285 N.C. 238, 253, 204 S.E. 2d 649, 659. In the case at bar, the persons threatened were not employees of one employer victimized by the taking of the employer’s property. Each person threatened was a victim, each being robbed of his personal property.
As to the “same offense” doctrine in Potter, supra, the majority held that verdicts of guilty in an armed robbery of two cash registers manned by separate employees of a food market were to be considered as a single verdict of guilty of armed robbery. In so finding the Court limited its holding to a situation in which there is “the use or threatened use of a firearm incident to the theft of their employer’s money or property.” State v. Potter, supra, at 253, 204 S.E. 2d, at 659. The Court expressed no opinion as to a factual situation in which the robber takes money or property of an employee or customer.
[3] Here defendants threatened the use of force on separate victims and took property from each of them. They were not employees. It was not the employer who was robbed. Rather each separate victim was deprived of property. The armed robbery of each person is a separate and distinct offense, for which defendants may be prosecuted and punished.
[4] Next, we consider the defendant’s allegation that it was error for the Court to permit leading questions in the voir dire examination of witnesses Frye and Dunn as to their identification testimony. “The trial court has discretionary authority to permit leading questions in proper instances [citation].” State v. Bass, 280 N.C. 435, 448, 186 S.E. 2d 384, 393. Further, “the rulings of the judge on the use of leading questions are discretionary,” and such rulings are “reversible only for abuse of discretion.” 1 Stansbury, N. C. Evidence (Brandis Revision) § 31. Also see State v. Bass, supra, at 448, 186 S.E. 2d, at 393.
In Bass, the North Carolina Supreme Court held that the trial judge’s decision to permit leading questions asked by the solicitor in examining a rape victim on voir dire as to identification testimony was permissible and showed no abuse of discretion.
[5] The third contention of defendant is that the Court erred in finding that the in-court identification of defendants by the witnesses was based solely upon their observation of defendants *57at the place of the alleged crime. The trial judge conducted a voir dire examination and found the identification to be of independent origin. That finding was fully supported by the evidence.
The robbery occurred inside a well-lighted building. It was not yet dark and the lights were on inside the building. Both witnesses testified that they were in the presence of defendants for approximately ten minutes and that they viewed the full face of each defendant. At one point, witnesses were within one foot of one of the defendants. Such “findings of facts by the trial judge are conclusive when, as here, they are supported by competent evidence, [citations].” State v. Bass, supra, at 445, 186 S.E. 2d, at 391. We find no error in the trial court’s ruling on this issue.
[6] Fourthly, the defendant contends that the Court erred in permitting. the testimony of William Little claiming it constituted improper rebuttal evidence. It appeared to have rebuttal .value to the testimony elicited from defendant’s witness immediately preceding Little. But even assuming that we did not find Little’s testimony to be in the nature of rebuttal, there would not necessarily be error, for the question of rebuttal testimony is generally subject to the sound discretion of the trial court. Williams v. U. S., 151 F. 2d 736. It is within the discretion of the trial judge to permit, in the interest of justice, the examination of witnesses at any stage of trial. State v. King, 84 N.C. 737. This discretion to determine the order of testimony will not be interfered with unless it is abused. State v. Stancill, 178 N.C. 683, 100 S.E. 241.
[7] Finally, defendant cites as error the Court’s allowing SBI Agent Parker to refer to his notes while testifying. A law enforcement agent may properly use notes taken during an investigation to improve his recollection as to specific dates and details of an investigation. In addition, there are a number of cases ' supporting the proposition that while a witness may usually speak from memory, he may refer to paper, memoranda or other written instruments to refresh his memory. State v. Peacock, 236 N.C. 137, 72 S.E. 2d 612; Steele v. Coxe, 225 N.C. 726, 36 S.E. 2d 288. It is permissible for the witness to refer to his notes when he cannot properly recall events. See State v. Staton, 114 N.C. 813, 19 S.E. 96. See 1 Stansbury, N. C. Evidence (Brandis Revision) § 31.
*58• Careful consideration of each of defendant’s assignments or error having been given, we find no error.
No error.
Judges Campbell and Parker concur.