A jury convicted Defendant Gerardo Corchado on two counts of distributing less than 100 grams of heroin in violation of 21 U.S.C. § 841(a)(1) and one count of using a minor to commit a drug offense in violation of 21 U.S.C §§ 861(a)(1) and (b). *817 The district court sentenced Defendant to eighty-seven months imprisonment. On appeal, Defendant argues the district court: (1) erred by permitting the Government to question him about a prior drug conviction on cross-examination; (2) enhancing his sentence based on findings that he obstructed justice and committed the instant drug offenses while on probation; and (3) treating the United States Sentencing Guidelines as mandatory. We have jurisdiction pursuant to 28 U.S.C. § 1291 and 18 U.S.C. § 3742, and affirm.
I.
In September 2003, Albuquerque Police Department Officer Matthew Lujan, working undercover, assumed the role of a buyer interested in purchasing heroin. Through the use of a confidential informant, Officer Lujan arranged to meet Defendant at a Sonic restaurant. During the meeting Lujan purchased one ounce of heroin from Defendant. Defendant agreed that Lujan could purchase additional heroin if it proved to be of satisfactory quality. Lujan was wearing a recording device during the transaction. Later the same month, Lujan contacted Defendant by telephone to arrange for a second heroin purchase. Lujan recorded the conversation. Again, Lujan agreed to meet Defendant at the Sonic restaurant. During this meeting, undercover DEA Agent Jeffrey Armijo accompanied Officer Lujan. Defendant’s half-brother, Francisco Javier Holguin, who was a minor at the time, accompanied Defendant. Lujan purchased two ounces of heroin. Again, Lujan was wearing a recording device during the transaction. Defendant was arrested in December 2003 on an outstanding warrant. A federal grand jury subsequently indicted Defendant the same month.
Before trial, Defendant filed a motion in limine seeking to exclude any testimony regarding his previous felony drug conviction for possession of marijuana. The Government argued the evidence was admissible under Fed.R.Evid. 404(b) to show Defendant’s knowledge, intent, and absence of mistake with regard to the heroin he was charged with distributing. The court conditionally granted Defendant’s motion. The court reasoned the probative value of such evidence was minimal because Defendant completely denied any possession or sale of the heroin, and not merely that the drugs were in his possession without his knowledge or by mistake or accident. The court deferred ruling on whether Defendant’s prior conviction might be relevant for any other purpose, including impeachment. The court also instructed the lawyers to approach the bench or seek leave outside the jury’s presence before eliciting any testimony concerning Defendant’s prior conviction.
At trial, Defendant argued Holguin actually sold the heroin to Officer Lujan. Several of Defendant’s relatives testified on his behalf, including Holguin, who testified he was the individual who sold the heroin to Lujan. Defendant also took the stand in his own defense. Defendant denied being involved in the two drug sales and testified he had never been to the Sonic restaurant where the transactions occurred. He testified the voice on the recordings was that of his half-brother, Hol-guin. On direct examination, Defendant testified as follows:
Q. Did you ever do a drug deal on September 11, 2003.
A. No, Never.
Q. Did you do a drug deal on September 17, 2003?
A. Never.
* * *
Q. What did you tell the DEA?
*818 A. He asked me if I had employed a minor, a young man, to sell drugs for me. I told him never. He said the young man was driving a Mustang that was in my name, that I had sent him to sell drugs. I told him I had never sold drugs in my hands, I never sent anyone. He answered me with bad words. He told me it’s a Mustang. He showed me a photograph. He said, “It’s yours.” And I said, “Yes, it’s mine.” Afterward, he asked me, “Why did I have the young man selling drugs?” I said never until he told me the name of the person who had sold the drugs. He said it was Francisco Holguin. I answered that Fransicso Holguin is my brother.
[T]hey asked me if I know a person whose name was Lujan and he drove a blue Escalade, if he had given me the drugs to sell them. I told him I never sold drugs. He said that, [d]id he give it to Javier? If you want to know, I said, ask Javier because I have nothing to do with that.
Without seeking permission from the court or requesting a bench conference, the Government on cross examination questioned Defendant about his previous drug offense as follows:
Q: Now, in some of your testimony ... you indicated that you have never handled drugs.
A: I was not referring to that. On that occasion, I was never there, I was never present. I was never in that place. What was the name of that restaurant? That’s what I was referring to.
Q: In fact, Mr. Corchado, you, in fact, possessed over five pounds [of marijuana] but less than 50 pounds in El Paso County, Texas, in August of 1998; is that correct?
A: That is correct, in 1998. At that time, I was not tried. I did not go to trial. I accepted the responsibility. I pled guilty.
Defendant never objected to this line of questioning.
II.
Defendant first argues on appeal that the Government’s foregoing questioning regarding his prior conviction warrants reversal. Because Defendant did not object at trial, our review is limited to whether plain error occurred. “Plain error occurs when there is (1) error, (2) that is plain, which (3) affects substantial rights, and which (4) seriously affects the fairness, integrity, or public reputation of judicial proceedings.”
United States v. Gonzalez-Huerta,
To satisfy the third prong of the plain error test, Defendant must show the error “ ‘affected the outcome of the district court proceedings.’ ”
Gonzalez-Huerta,
The record on appeal shows Officer Lujan identified Defendant at trial as the individual who sold him heroin on two occasions. Additionally, DEA Agent Ar-mijo, who accompanied Officer Lujan during one of the September meetings, unequivocally identified Defendant as the individual at Sonic who sold heroin to Lujan. The jury also heard recordings of Defendant’s voice, heard a voice exemplar Defendant provided to the DEA, and heard him testify. Thus, the jury was able to make its own determination as to whether the voice on the recordings was Defendant’s or Holguin’s. The jury obviously concluded the voice was Defendant’s. In light of this evidence, we cannot conclude a “reasonable probability” exists that the outcome of Defendant’s trial would have been different had the Government not questioned Defendant about his prior conviction.
See United States v. Beers,
III.
Defendant next challenges his sentence. In calculating Defendant’s sentencing guideline range, the district court began with a base offense level of 26. The court determined Defendant provided false testimony during the trial and therefore added two points for obstruction of justice, resulting in an adjusted offense level of 28. See U.S.S.G. § 3C1.1. In calculating Defendant’s criminal history category, the district court added two points pursuant to U.S.S.G. § 4A1.1(d) because Defendant was on probation from his previous drug conviction when he committed the instant offense. This increased Defendant’s criminal history category from I to II.
Prior to sentencing, the Supreme Court issued its decision in
Blakely v. Washington,
After sentencing, the Supreme Court decided
United States v. Booker,
— U.S. -,
We have delineated
Booker
error as either constitutional or unconstitutional.
Gonzalez-Huerta,
A.
First, we address the district court’s enhancement of Defendant’s criminal history category based on its finding Defendant was on probation when he committed the instant offenses. We find the enhancement of Defendant’s criminal history category based on his probation status did not violate the Sixth Amendment. A judge may determine a fact of prior conviction without violating the Sixth Amendment.
Almendarez-Torres v. United States,
B.
Next, we address Defendant’s challenge to the district court’s enhancement
*821
of his offense level based on its finding he committed obstruction of justice. The district court undoubtedly engaged in judicial fact-finding by enhancing Defendant’s offense level from a 26 to 28 based on obstruction of justice.
United States v. Dazey,
C.
Finally, we address Defendant’s claim of non-constitutional
Booker
error. The
Booker
Court excised 18 U.S.C. § 3553(b)(1), thereby rendering the Guidelines discretionary.
Booker,
AFFIRMED.
Notes
. Defendant asked the court to apply the principles in
Blakely
to his criminal history calculation, thereby decreasing his criminal history category to I. The court declined, finding the fact that Defendant was on probation at the time of the instant offense was a fact of a “prior conviction” and therefore not subject to the
Blakely
principles.
See Apprendi v. New Jersey,
