A grand jury indicted Samuel Todd Taylor for possession of more than five grams of cocaine with intent to distribute in violation of 21 U.S.C. §§ 841(a)(1) and (b)(1)(B), and for being a felon in possession of firearms in violation of 18 U.S.C. §§ 922(g)(1) and 924(a)(2). After separate trials before separate juries, Taylor was convicted of both counts and has appealed the convictions. We have consolidated these appeals because they involve overlapping issues and now affirm both convictions.
I.
Taylor’s arrest and convictions stem from a search of 1614 S. Fellows St., where police found firearms and crack cocaine. The officers obtained a search warrant for the residence based on a controlled purchase by a confidential informant as well as statements from other informants that indicated nareot-ics-related traffic at that residence. Surveillance confirmed the drug traffic at the residence and police executed the warrant in the early morning, finding Taylor asleep with his girlfriend Sheila Gaston. In the bedroom where the pair were found sleeping, the police observed a padlocked closet. Inside the closet, they found men’s clothing and cologne, a receipt with Taylor’s name on it, a shotgun, semi-automatic handguns, and ammunition. No women’s clothing was found in the closet. Men’s walking shorts were found next to the bed, and in the pockets, police found a pager registered to Taylor, a wallet containing Taylor’s identification, $805 in *679 cash, and a clear plastic baggie containing crack cocaine. In the house, police found a number of items associating Taylor with that residence, including a driver’s license, a vehicle title certifícate, and a hospital billing statement for him with that address. The officers later established that the defendant’s pager and his health insurance were obtained with that address listed as his residence. On the morning of the search, Ms. Gaston made a videotaped statement to the police confirming that Taylor lived there, that the walking shorts belonged to him, and that she had seen him recently in possession of crack cocaine and believed crack was sold out of the house. Taylor denied that the drugs or guns were his and claimed that he did not reside there.
A grand jury subsequently returned a two count indictment against Taylor for possession with intent to distribute and for being a felon in possession of a firearm. The district court granted his request for separate trials on the two counts before separate juries. Prior to each of the trials, Taylor moved to quash the indictment and the search warrant, and to suppress the evidence seized from the residence. The district courts denied those motions. A jury convicted him on the firearms count, but the first trial of the crack cocaine count resulted in a hung jury. A second trial on that count resulted in a conviction. Taylor now appeals his convictions to this Court.
II.
On appeal, Taylor raises a myriad of issues, none of which entitle him to relief. Some relate to both convictions and some to one of the trials. We will address the issues common to both convictions first.
A.
First, with respect to both convictions, Taylor argues that the police lacked probable cause for obtaining the search warrant. He asserts that the affidavit which formed the basis for the warrant lacked indicia of reliability. The facts of record belie that argument, and support the magistrate’s determination of probable cause. In order to find probable cause for a search warrant, the magistrate need only find that the totality of the circumstances demonstrates a “fair probability that contraband or evidence of a crime will be found.”
Illinois v. Gates,
B.
In a related claim, Taylor contends that the district court erred in limiting the scope of cross-examination during a
Franks
hearing held to determine the veracity of the affidavit. A
Franks
hearing is proper where the defendant has made a substantial preliminary showing that an affiant, in obtaining a search warrant, included deliberately false material statements, or recklessly disregarded the truth.
Franks v. Delaware,
438 U.S.
*680
154, 170-171,
Moreover, even if a Franks hearing had been required, the limits placed upon the cross-examination were proper efforts to focus the questioning on relevant lines of inquiry. The questions precluded by the judge addressed circumstances unrelated to the statements in the Dennin affidavit, or involved a rehashing of points that Taylor had already made. For example, Taylor repeatedly attempted to establish that the $20 bill used by the confidential informant in the controlled purchase was not found in the subsequent search of the residence. He argued that discovery of the $20 bill at the residence would have confirmed that the controlled purchase actually occurred, but that its absence established that the purchase never took place. This argument is a stretch given that the search occurred two days after the controlled purchase. Because the absence of the $20 bill at that time was not probative of Dennin’s truthfulness in relation to the controlled purchase, the district court was correct to limit the testimony. Moreover, the questioning had already yielded the fact that the $20 bill was not found, so further inquiry was repetitive and was properly refused.
Taylor also complains that the district court refused to allow him to subpoena the magistrate who issued the warrant. Taylor provided to the district court a Verified Offer of Proof regarding the testimony he hoped to obtain from the magistrate judge. In essence, the Offer of Proof stated that the magistrate judge would testify that he believed the allegations in Dennin’s affidavit and issued the warrant based upon those allegations. That testimony adds nothing to the question of whether Dennin recklessly submitted an affidavit containing false statements. Because the magistrate judge’s testimony was irrelevant to the fundamental issues regarding the truth or falsity of the affidavit and Dennin’s state of mind, the court properly refused that request. Therefore, the court did not err in limiting the scope of the evidentiary hearing, and in fact provided Taylor with a more extensive opportunity to develop his argument than the law would require.
C.
The defendant next complains that the grand jury indictment was fundamentally flawed and should have been quashed. Toward that end, he argues that the government improperly introduced evidence of his gang affiliation, and that the indictment was based solely on hearsay. 2 The testimony regarding the gang affiliation came at the initiation of a grand juror during the questioning of the witness:
JUROR: So is this the Sammy Taylor of Dawg Life? 3
MR. GRIMMER (Asst.U.S.Atty): Let me — Why don’t you answer that. Go ahead and answer the question.
WITNESS: Yes, it is.
JUROR: Does this disarm that situation somewhat or—
MR. GRIMMER: I — Let me — Let me— Let me go into that. First of all, the record should be clear that there is — the record should be clear that there is an investigation being conducted into a group called Dawg Life; and this agent has testified as to that investigation.
*681 As to the evidence with respect to this particular indictment, you must find probable cause as to the-the charges here based upon the evidence that’s been presented to you here today. And the fact that simply there is allegations that Mr. Taylor is involved in Dawg Life simply remain that. And I guess what you’re hearing here today is testimony from a search warrant.
Transcript of Grand Jury Proceedings, April 4, 1996, at 22-23. Taylor argues that this colloquy so tainted the proceedings that the court was required to quash the indictment. We need not consider whether allowing a reference to gang affiliation was error because the reference was harmless. Because a petit jury returned a conviction on both counts, any such errors in the presentation of evidence to the grand jury are harmless as a matter of law.
4
United States v. Anderson,
Taylor attempts to avoid this result by arguing that the error affected the structural integrity of the proceedings, and violated his right to equal protection under the Fourteenth Amendment. He analogizes to
Vasquez v. Hillery,
Taylor also argues that the indictment must be quashed because it is based solely on hearsay testimony. The Supreme Court has held, however, that an indictment may be based entirely upon hearsay testimony.
Costello v. United States,
III.
Taylor also raises a number of issues that are unique to the respective convictions, and we will address the firearms conviction (Appeal No. 971004) first. Taylor argues that this conviction was not supported by sufficient evidence, and- that the court erred in enhancing his sentence on the firearms conviction based upon possession of crack cocaine. These contentions are also without merit.
A challenge to the sufficiency of the evidence can only succeed if the evidence
*682
is insufficient for a rational juror to find guilt beyond a reasonable doubt.
United States v. Duncan,
Taylor also contends that the court erred in enhancing his sentence on the firearms charge by four levels based upon possession of crack cocaine because a jury had not yet convicted him of the possession of crack cocaine charge. He thus maintains that the court violated the due process and double jeopardy clauses by considering that conduct. The Supreme Court has expressly rejected this argument in
United States v. Watts,
IV.
With respect to the conviction for possession of cocaine base (Appeal No. 98-1120), Taylor argues that the court erred when it adopted a prior court’s order denying his pre-trial motions, refused to allow a polygraph expert to testify, limited the questioning of a witness, and sentenced him under the crack cocaine provisions of the guidelines. We will address these meritless challenges seriatim.
A.
Taylor was tried on the possession charge twice, with the first trial ending in a hung jury. 5 He argues that the district court in the second trial erred when it adopted the decision of the first trial court rejecting his motions to dismiss the indictment, quash the search warrant, and suppress the evidence. According to Taylor, that adoption constituted a refusal to consider his motions, and was a denial of due process and an abuse of discretion. This argument is unsupported by the record. In its order denying the motions, the second court noted that the motions had been denied in the first trial by Judge Sharp in an “extensive and thoughtful written order.” The court then adopted the reasoning of Judge Sharp in again denying the motions. There is no denial of due process or abuse of discretion in a decision which merely denies a motion based on reasoning expressed initially by another court. The court did not fail to consider the motions; rather, the court considered and rejected them for the same reasons that they had been rejected in the past.
B.
Taylor next contends that the court erred when it limited the testimony of certain defense witnesses. In particular, the court refused to allow a polygraph expert to testify regarding the results of a polygraph exam. The court also limited the questioning of another defense witness to exclude questions *683 which would implicate the witness’ right against self-incrimination. We first address the trial court’s exclusion of testimony by a polygraph expert for the defense. Taylor’s theory of defense was , that the drugs actually belonged to his girlfriend, Sheila Gaston. He sought to introduce the testimony of a polygraph expert that Gaston was telling the truth when she declared that the drugs belonged to her. Such testimony was allowed in the first trial, which resulted in a hung jury. After an evidentiary hearing, the district court decided to exclude testimony regarding the polygraph examination in the second trial.
We will not reverse a decision regarding the admissibility of expert testimony unless the court abused its discretion.
General Electric Co. v. Joiner,
— U.S. -,
The Supreme Court in
Daubert v. Merrell Dow Pharmaceuticals, Inc.,
C.
Taylor next complains about the procedure the court followed when a defense witness declared an intent to invoke her right against self-incrimination but that witness also possessed non-privileged information. The defense witness was Paula Patterson, the aunt of Sheila Gaston. Gaston asserted that Patterson provided the crack cocaine to her, and Patterson informed the district court that she intended to assert her Fifth Amendment right against self-incrimination. The district court conducted a hearing to identify which areas of inquiry would trigger Patterson’s invocation of her Fifth Amendment right. The court then instructed Taylor not to ask those questions before the jury. The court did allow Taylor to explore areas involving non-privileged information. When Taylor’s counsel strayed into areas that would have caused the witness to “take the fifth,” the prosecutor objected and the court sustained the objections. Taylor now argues that he should have been allowed to ask those questions, and that the jury should have been able to hear the witness invoke her Fifth Amendment right against self-incrimination. According to Taylor, the refusal of the court to allow the questions “shielded Patterson from a jury determination of her credibility,” and left the door open for the government to argue in its closing that the crack cocaine was Taylor’s and that he was the supplier for Gaston.
Taylor’s argument is unavailing for a number of reasons. First, the jury may not properly draw any inference from a person’s exercise of her Fifth Amendment right against self-incrimination.
United States v. Harris,
Second, the trial judge was faced with the problem of a defense witness who possessed both privileged and non-privileged information. In this case, the court simply attempted to limit the questioning to non-privileged information. The Sixth Amendment grants the defendant the right to compel a witness’ testimony, but that right is not unlimited and does not extend to testimony that is “incompetent, privileged or otherwise inadmissible under standard rules of evidence.”
Taylor v. Illinois,
D.
The final challenge asserted by Taylor is that the court erred in sentencing him based upon possession of crack cocaine. He contends that the evidence at trial established the presence of cocaine base, but did not necessarily establish that the cocaine base was in the form of crack cocaine. Therefore, he argues, he should not have been sentenced under the enhanced provisions for possession of crack cocaine.
In
United States v. Adams,
“Cocaine base,” for the purposes of this guideline, means “crack.” “Crack” is the street name for a form of cocaine base, usually prepared by processing cocaine hydrochloride and sodium bicarbonate, and usually appearing .in a lumpy, rocklike form.
U.S.S.G. § 2Dl.l(c)(D). Therefore, we held that the government must prove by a preponderance of the evidence that a defendant possessed “crack” cocaine in order to enhance the sentence under that provision. Id. In this case, sufficient evidence exists to prove that the form of cocaine base possessed by Taylor was “crack.” First, a chemist for the Indiana State Police testified that she analyzed the substance and identified it as containing cocaine base, and that she knew cocaine base by its .slang term “crack.” Thus, she appeared to be limiting the term “cocaine base” to “crack,” as does this guideline. This interpretation was furthered when she compared the substance with cocaine in its powder or salt form, and noted that this cocaine base was in a “hard rock-like form” with a very high level of purity. The trial reveals numerous references in which witnesses characterized the substance found as “crack” cocaine, from the police officer to defense witnesses. In fact, the defense expert on drug trafficking stated that the substance appeared to be crack cocaine. In sum, there was sufficient evidence to conclude by a preponderance that the cocaine base in this case was “crack.” Ac-, cordingly, the court did not err in sentencing Taylor under that provision.
V.
For the above reasons, the decisions of the district courts in both cases are AFFIRMED.
Notes
. The hearsay challenge was presented in appeal 98-1120 but not 97-1004, so our disposition of this issue is relevant only to 98-1120.
. Dawg Life is a gang.
. We note in passing, however, that immediately following the introduction of that evidence, the government instructed the grand jury to limit its consideration to the evidence presented regarding the search warrant. That statement ameliorated any prejudicial effect that the gang reference may have had.
. The case was assigned to a different judge, Judge Moody, for the second trial.
. The reverse situation, in which the non-privileged information is heard and the witness invokes the Fifth Amendment privilege in front of the jury for select questions, has also been the subject of court challenges, so Taylor’s preferred approach is also subject to problems.
See Namet v. United States,
