OPINION
HATHAWAY, Judge.After a jury trial, appellant was found guilty of three counts of sexual assault. He was initially sentenced to an aggravated term of 10 years’ imprisonment on each count, the sentences to be served consecutively. The trial judge subsequently vacated those sentences and resentenced appellant to an aggravated term of 14 years’ imprisonment on each count, the terms to be served concurrently.
Appellant was employed as a gastrointestinal technician at University Medical Center. A female patient was sent by her doctor to the office where appellant worked to make an appointment for a flexible sigmoidoscopy test. Appellant asked the patient if a hemocult, a test to determine if there is blood in the stool, had been performed. When informed that the patient was not certain, appellant gave her a cup and told her he needed a stool sample. She replied that was impossible because she had problems with regularity. Appellant then instructed her to go into the next room, uncover her buttocks and lie on the table. He inserted his finger into her rectum to obtain the stool sample.
After she left the hospital, the woman began to think that something was wrong with what had occurred. She spoke the next day to her sister, who was a nurse. About two weeks later, she called her doctor and told him what had occurred. Two weeks later, she reported the incident to the police.
The sole issue raised on appeal concerns a question asked by the prosecutor during cross-examination of three of appellant’s character witnesses. In its cross appeal, the state challenges the trial court’s resentencing of appellant after an appeal had been filed. We find that the question asked by the prosecutor constituted fundamental error and reverse. We need not, therefore, address the cross appeal.
In a motion in limine, the state moved to introduce into evidence the details of another prosecution against appellant which subsequently resulted in his acquittal. In that case, appellant was charged with sexually assaulting a woman after he had given her a drug. The court denied the motion, but *379permitted the state to inquire about the drug. The dialogue was:
THE COURT: Let me ask you, did he admit to stealing the drug Versed from where he worked?
PROSECUTOR: St. Joseph’s Hospital. DEFENSE COUNSEL: I don’t think he ever admitted to stealing it. I think he admitted to having some Versed.
THE COURT: Was he ever terminated from that position for stealing?
DEFENSE COUNSEL: No.
* * * * * *
THE COURT: I am going to allow the state to ask the witnesses if they knew that Mr. Anderson had ever stolen a drug from his employers [sic].
During cross-examination of one of appellant’s character witnesses, the following exchange took place:
Q. Are you aware Mr. [witness] that in 1989 the defendant admitted to stealing from St. Joseph’s Hospital, his employer at the time, a drug known as Versed?
A. No, ma’am.
Q. Knowing that, that the defendant has stolen drugs from his employer, would that change your opinion about the defendant’s character for truthfulness and honesty?
A. If I knew that he took—
Q. Knowing that, knowing that he has admitted to that, does that change your opinion?
A. No, ma’am.
(Emphasis added) Similar statements by the prosecutor that appellant had admitted to having stolen drugs were made during the cross-examination of two other character witnesses.
Trial counsel offered no objection to the questioning of these witnesses. Ordinarily, the “failure to object to evidence, testimony or arguments waives these matters on appeal.” State v. Thomas, 130 Ariz. 432, 435, 636 P.2d 1214, 1217 (1981). Where, however, the error goes to the foundation of the case or is “of such dimensions that it cannot be said it is possible for a defendant to have had a fair trial,” State v. Smith, 114 Ariz. 415, 420, 561 P.2d 739, 744 (1977), the defendant’s failure to object does not waive his rights on appeal. State v. Mincey, 130 Ariz. 389, 397, 636 P.2d 637, 645 (1981), cert. den., 455 U.S. 1003, 102 S.Ct. 1638, 71 L.Ed.2d 871 (1982). “The right to a fair trial is a fundamental liberty secured by the Fourteenth Amendment.” Estelle v. Williams, 425 U.S. 501, 503, 96 S.Ct. 1691, 1692, 48 L.Ed.2d 126, 130 (1976).
It is possible that even fundamental error might have little effect on the jury. “The test is whether we can say the impact of the evidence on the jury was so slight that, without the error, it is clear beyond a reasonable doubt the jury would have returned the verdict of guilty.” State v. Corrales, 138 Ariz. 583, 595, 676 P.2d 615, 627 (1983).
Here, the prosecutor falsely told the jury that appellant had admitted to having committed a criminal act, stealing drugs. “To ask a question which implies the existence of a prejudicial factual predicate which the examiner cannot support by evidence is unprofessional conduct and should not be condoned.” State v. Ballantyne, 128 Ariz. 68, 71, 623 P.2d 857, 860 (App. 1981); accord State v. Stabler, 162 Ariz. 370, 373, 783 P.2d 816, 819 (App.1989); State v. Palmonarez, 134 Ariz. 486, 489, 657 P.2d 899, 902 (App.1982); Gooden v. State, 617 P.2d 248 (Okla.Crim.1980); Commonwealth v. Smith, 457 Pa. 638, 326 A.2d 60 (1974); State v. Hicks, 618 S.W.2d 510 (Tenn.Crim.App.1981). See State v. Holsinger, 124 Ariz. 18, 21, 601 P.2d 1054, 1057 (1979).
In State v. Castillo, 486 So.2d 565 (Fla. 1986), the court found reversible error in the prosecutor’s implication, without any apparent factual basis, that a defense witness had committed an illegal act, thus discrediting her in the eyes of the jury. Here, the prosecutor didn’t imply an illegal act, she stated it as a fact, and it wasn’t a defense witness who was discredited, but the defendant himself. The veracity of the victim and the defendant were crucial, and unfavorable inferences created by the prosecutor’s improper question went directly to that issue. We cannot say beyond a rea*380sonable doubt that, absent the error, the jury would have returned a guilty verdict.
“The practice of seeking to obtain an advantage in a trial of a case by injecting therein unfair insinuations should have the severest condemnation and suffer the most disastrous result permissible under the law.” State v. Jones, 306 Mo. 437, 449, 268 S.W. 83, 87 (1924), quoting Parris v. Crutcher, 189 Mo.App. 150, 154, 173 S.W. 1080, 1081 (1915).
Reversed.
FERNANDEZ, J., concurs.