Before Glickman, Associate Judge, and Ferren and King, Senior
The opinion of the court was delivered by: Glickman, Associate Judge
Appeals from the Superior Court of the District of Columbia (Hon. Gregory E. Mize, Trial Judge)
In Thomas v. United States, 650 A.2d 183 (D.C. 1994) (en banc), we held that in prosecutions under the District of Columbia Controlled Substances Act, codified as amended in D.C. Code § 33-501 et seq. (1998), the government need only prove a measurable rather than a usable amount of the controlled substance in question. In the present appeals, appellants challenge their convictions under D.C. Code § 33-541 (a)(1) for unlawful distribution of the controlled substance heroin because, they claim, the government failed to prove the presence of a measurable amount of the drug. We agree with that claim and accordingly reverse appellants' convictions.
Appellants were arrested on April 28, 1998, after selling two blue ziplock bags containing white powder to an undercover United States Park Police Officer. The bags were submitted to the Drug Enforcement Administration (DEA) laboratory for chemical analysis. At trial, the government introduced a "DEA-7" chemist's report to prove that the bags contained a measurable amount of a controlled substance. The chemist who prepared the report did not testify. The DEA-7 stated that the white powder in the two bags weighed 0.18 grams and was "found to contain a small amount of Heroin and Quinine." The report further stated that the heroin weighed "less than 0.5" milligrams and that its "strength" was "less than 0.5%." The report contained no further information as to the quantity of heroin in the two ziplock bags that appellants sold.
Detective Vincent Colmes testified for the government as an expert witness on the distribution, use and packaging of narcotics and related matters. He testified that the packaging and sale in this case were typical of street level heroin distribution. Not having prepared the DEA-7, Detective Colmes acknowledged that he had "no idea" how much heroin was in the ziplock bags that appellants sold, other than that it was less than 0.5 milligrams. He testified that he nonetheless believed that the report reflected a measurable amount of heroin in that "the measurement was less than 0.5 percent."
Detective Colmes further testified that quinine, the second substance found by the DEA chemist, is used to "cut the heroin or bulk it up." In an average "hit," Detective Colmes stated, a usable amount for an individual heroin user would be approximately seventy to seventy- five milligrams of a mixture of both heroin and the quinine "cut." When asked how much heroin would be needed in such a mixture for an average hit, Detective Colmes testified that, while it depends on the individual, the DEA "has established a particular dosage unit for heroin and that is five percent."
Appellants moved for a judgment of acquittal on the ground that the government had failed to establish that a measurable amount of heroin had been distributed. Denying those motions, the trial court stated that the government's burden is to prove a measurable amount, but not necessarily a "measured amount or a precisely measurable amount." The trial court concluded that "when [the DEA-7] has indications that a small amount of heroin and quinine were present, . . . and that the strength of the heroin was less than 0.5 percent and its net quantity less than 0.5 milligrams, . . . the government has shown that there was some heroin in that it was measurable."
In determining whether the evidence was sufficient to sustain a conviction, we utilize the same standard the trial court uses in ruling on a motion for a judgment of acquittal. See Curry v. United States, 520 A.2d 255, 263 (D.C. 1987).
So as not to displace the role of the jury, the court deciding the motion must review the evidence in the light most favorable to the government, giving full play to the right of the jury to determine credibility, weigh the evidence, and draw justifiable inferences of fact, and making no distinction between direct and circumstantial evidence. . . . The motion for judgment of acquittal must be granted if the evidence, when viewed in the light most favorable to the government, is such that a reasonable juror must have a reasonable doubt as to the existence of any of the essential elements of the crime. Id. (citations omitted).
At a minimum, this means that the government "must present `at least some probative evidence on each of the essential elements of the crime.'" Robinson v. United States, 506 A.2d 572, 573 (D.C. 1986) (quoting Jennings v. United States, 431 A.2d 552, 555 (D.C. 1981)).
In a prosecution for unlawful distribution of heroin, a Schedule I controlled substance, see D.C. Code § 33-514 (2)(K), the government must show either by direct or circumstantial evidence that a measurable amount of heroin was distributed. See Thomas, 650 A.2d at 197. "[T]he term measurable is defined as capable of being measured or quantified." Id. at 197 n.48. The government need not prove the presence of a "usable" amount of the controlled substance, i.e., "an amount which can be used as a narcotic," Edelin v. United States, 227 A.2d 395, 397 (D.C. 1967), though if the government does establish such usability it will have met its burden, since "if a substance is usable it is also measurable." Thomas, 650 A.2d at 197 n.46. If, however, the evidence merely establishes that a trace of the controlled substance was detected, without also showing that the detectable amount is quantifiable, then the evidence is insufficient to sustain a conviction. See id. at 196. For example, this court held in Singley v. United States, 533 A.2d 245 (D.C. 1987), that a chemical ...