Appellant Rasheed Duvall asks us to reverse his conviction for possession of a controlled substance. D.C.Code § 48-904.01(d) (2001). He contends that the government violated his constitutional rights under the Confrontation Clause of the Sixth Amendment by introducing a Drug Enforcement Administration (DEA) laboratory report in evidence against him without calling the chemist who prepared the report to testify in person, subject to cross-examination. 1 We agree — and the government concedes — that the Confrontation Clause was violated. Contrary to the government’s position, however, we cannot conclude that the error was harmless beyond a reasonable doubt. Accordingly, we reverse and remand for a new trial.
I.
On September 1, 2005, Metropolitan Police Department (MPD) Officer Charles Hoetzel was driving an unmarked police cruiser near the 200 block of Hamilton Street, N.W. He noticed a moving automobile with a cracked windshield and stopped it to investigate. The officer asked the driver, later identified as appellant Duvall, for his driver’s license and registration information. Upon smelling the odor of marijuana emanating from Du-vall’s vehicle, he asked Duvall to step out and inquired whether there was anything illegal inside. Duvall got out of the car, told Officer Hoetzel that there was nothing inside, and invited the officer to “check the whole thing.”
As Officer Hoetzel began his inspection, he noticed that the floor mat on the driver’s side was “pushed up” against the front of the car. Lifting up the floor mat, he recovered a clear plastic bag containing a green weed substance that he suspected was marijuana. The officer testified at trial that after he had recovered the bag, Duvall spontaneously had exclaimed: “Oh, that bag, I forgot about it.” By this point, other MPD officers had arrived, freeing Officer Hoetzel to conduct a field test on a portion of the green substance from the bag. The test yielded a positive color which, according to Hoetzel, indicated the presence of THC, the active ingredient in marijuana. Officer Hoetzel placed the bag in a heat seal for later submission for DEA analysis. He then arrested Duvall.
*842 Officer Hoetzel was the government’s only witness at trial. 2 In addition to Officer Hoetzel’s testimony, the government introduced the heat seal and, over objection, the trial court also admitted the DEA-7 laboratory analysis, which indicated that the substance found inside Duvall’s car was marijuana. 3 Counsel for Duvall objected that the DEA report was hearsay evidence, and that its admission in evidence would violate Duvall’s Sixth Amendment rights. The trial court recognized that, as of the time of trial in November 2005, this court had not resolved whether a chemist’s report constituted “testimonial” hearsay within the scope of Confrontation Clause protection. That said, the trial court overruled counsel’s objection, concluding that because the existing statutory scheme permitted Duvall to subpoena the chemist if he wished to challenge the chemist’s finding, the government’s introduction of the DEA-7 without itself requiring the chemist to testify would not violate Duvall’s Sixth Amendment rights.
On cross-examination, Officer Hoetzel testified that he had found no other drug paraphernalia, either in the vehicle or on appellant’s person, and that he had not seen Duvall smoke or burn anything, or make any furtive gesture. Duvall then took the stand and testified that he had told Officer Hoetzel that he had had nothing illegal in his possession. Duvall also testified that, when confronted with the bag Officer Hoetzel had removed from under the vehicle’s floor mat, Duvall had replied that it was not his. Duvall further testified that he had continued to deny ownership even after the officers pressed him several times to admit that the bag was his. Finally, according to Duvall, after the police had instructed him for the fourth time not to deny ownership — and while restrained by handcuffs — he had told the officers that “if there’s any possibility of it being mine, it had to have been in there for months and months and months.”
In closing arguments, the prosecution emphasized that the evidence confirmed that Duvall had constructively possessed a substance the DEA-7 showed to be a measurable amount of marijuana. Defense counsel emphasized that because Du-vall had not known that the marijuana was in the vehicle, the prosecution could not prove a case of constructive possession. The trial court credited Officer Hoetzel’s version of the facts, and found Duvall guilty of possessing a controlled substance. The court sentenced him to thirty days of incarceration, suspended, with one year of probation, and ordered him to complete sixty days of community service and to pay $50 to the Victims of Violent Crimes Compensation Fund.
II.
After the Supreme Court’s decision in
Crawford v. Washington,
Under the heightened constitutional standard of review, the government bears the burden of demonstrating that the constitutional error was “harmless beyond a reasonable doubt,” meaning that the verdict was “surely unattributable” to the erroneously admitted evidence.
Fields,
To prove Duvall’s guilt of possession of a controlled substance, the government had to show that Duvall (I) possessed a controlled substance, and (ii) did so knowingly and intentionally. D.C.Code § 48-904.01(d) (2001);
Mitchell v. United States,
While conceding that the admission of the DEA-7 without requiring the chemist to testify violated Duvall’s confrontation right, the government argues that the error was harmless beyond a reasonable doubt because the independent evidence of Duvall’s guilt was overwhelming,
see Schneble,
We recognize that in a prosecution for possession of a controlled substance, the government may establish that the substance is an illegal drug by means of circumstantial evidence.
Bernard v. United States,
In
Callaham,
we reversed appellant’s conviction for possession of cocaine be
*845
cause the trial court’s admission of the DEA-7 without requiring the government to call the chemist to testify was not harmless error.
Callaham,
Also, in
Fields,
we reversed appellant’s conviction for possession of marijuana because admission of the DEA-7 was not harmless error as to that charge — or even to the lesser included offense of attempted possession (the government’s fallback theory).
Fields,
The government attempts to distinguish the present case from
Fields
on the ground that the trial court here permitted Officer Hoetzel to testify without limitation about the result of the field test he performed on the substance recovered from Duvall, whereas in
Fields
the court cut off the field-test testimony in favor of reliance on the DEA-7.
Id.
at 861. We acknowledge that in contrast to Duvall’s case, the officer’s testimony concerning the field test in
Fields
was insufficient to make that evidence adequately reliable for consideration by the jury.
Id.
at 868. The field test in the present case does constitute
*846
evidence that the substance recovered from Duvall’s vehicle was marijuana, and we consider it in determining whether the evidence against Duvall was overwhelming. But the field test is not dispositive. We reversed appellant’s conviction in
Calla-ham
notwithstanding evidence of a positive field test for cocaine, because “a positive field test, standing alone, [cannot] prove beyond a reasonable doubt that the substance was cocaine.”
Callaham,
The government highlights another distinction between the facts of the present case and those in
Fields
and
Callaham:
Officer Hoetzel’s testimony that he detected the odor of marijuana from Duvall’s vehicle. We do not discount the significance of the odor testimony as part of the body of circumstantial evidence against Duvall, particularly when it comes from an MPD officer trained to recognize the scent of marijuana.
See Minnick v. United States,
Moreover, DEA lab reports have played a prominent role in drug prosecutions in this jurisdiction generally, and in this case in particular.
See
D.C.Code § 48-905.06 (2001) (prescribing procedure for admitting chemist reports);
Fields,
The government also asks us to consider Duvall’s own testimony, which it *848 contends, although falling short of a “full confession,” contained an admission that the substance recovered from his car was marijuana. The record shows that in response to questioning from his attorney concerning the circumstances of his arrest, Duvall replied that after the officers placed him in handcuffs they brought him to the front of the car and “reached underneath ... [the] floor mat and pulled out a bag of marijuana.” Duvall, however, testified that he had told the officers he had never seen the marijuana before his arrest. 10 Because Duvall consistently denied knowledge of the marijuana prior to the search, his testimony was plainly not an admission that the substance was marijuana.
The government also notes that Duvall’s trial counsel made repeated references to “marijuana” in his closing argument. However, in this case, the trial judge had admitted the DEA-7 over objection, and realistically, the defense was in no position to argue that the contraband was not marijuana. Under these circumstances counsel’s reference to the substance as marijuana, as part of his trial strategy contesting the possession element of the offense, cannot reasonably be considered an admission.
In sum, we conclude that the government has not eliminated the “reasonable possibility” that the DEA-7 contributed to Duvall’s conviction.
Callaham,
Reversed and remanded.
Notes
. D.C.Code § 48-904.01(d) (2001) makes it “unlawful for any person knowingly or intentionally to possess a controlled substance” unless obtained pursuant to a valid prescription or otherwise authorized by law.
. The trial court consolidated Duvall’s trial with the hearing on his pretrial motion to suppress his statements and the tangible evidence that the police had removed from his vehicle. Accordingly, Officer Hoetzel’s testimony was relevant both to the legality of the seizure and the ultimate question of Duvall’s guilt.
. We note that the trial transcript contains no testimony as to the contents of the lab report. In closing argument, however, the government referenced the report and noted that the report found that the substance recovered from Duvall’s car "tested positive for marijuana" with a reserve weight of 5.7 grams. The trial court found that the substance constituted a "measurable amount of marijuana.”
. We have noted the Supreme Court’s ruling that a "structural error” withholding a constitutional right “demands reversal without review for harmlessness.” Callaham,
. In
Melendez-Diaz,
the Supreme Court "did not reach” the question whether the error in admitting the forensic analyst certificates was harmless. Melendez-Diaz, - U.S. at - n. 14,
. The trial court, in the relevant portion of its findings of fact, observed that the substance recovered from Callaham was " 'tested with a net weight of .07 grams and following testing what remained was 0[].0494 grams, clearly a measurable amount of cocaine. So I find the defendant guilty of possession of cocaine.' ”
Callaham,
. Unlike Callaham, from whom the police recovered a "white rock substance” in a suspected drug transaction, Duvall did not admit that he possessed an "illegal” substance.
Callaham,
. The prosecutor, having explained why the evidence showed that Duvall had constructively possessed the green weed substance, concluded her closing statement as follows: "Therefore, Your Honor the — and it's a measurable amount, as demonstrated by the DEA analysis, and it is indeed marijuana.” The trial court entered its judgment on the record in the following manner: "So I would find, applying the logical inference here in crediting Officer Hoetzel's testimony, that the defendant was knowingly in possession of the measurable amount of marijuana that was found in the car, and thus he is guilty of possession of marijuana." (Emphasis added.) Although the court in the cited passage might have been referring to the heat seal (which contained the marijuana), it just as easily could have been referring to the DEA-7. This ambiguity supports our conclusion that the government has not met its burden of dispelling any reasonable possibility that the chemist’s report contributed to Duvall’s conviction.
. Those cases in which we have reviewed a Confrontation Clause violation for plain error also inform our analysis. In
Otts v. United States,
For an error to have affected an appellant’s "substantial rights,” a court must find that it had a "substantial and injurious effect or influence in determining the ... verdict.”
Dominguez Benitez,
. Duvall denied telling the officers that he had forgotten about the bag, as was Officer Hoetzel's testimony. Nor was Duvall’s statement to the officers that "if there’s any possibility of it being mine, it had to have been in there for months and months and months" an affirmative admission that the substance was marijuana. Duvall’s statements regarding the bag are, in any event, relevant only to the element of possession and not to the element of whether the substance was a controlled substance.
Fields,
