The opinion of the court was delivered by: BECHTLE
The facts adduced at trial are as follows: On October 11, 1972, Agent William Kean of the Drug Enforcement Administration ("DEA") together with Agent Kenneth Davis, met with Linda Johnson, a Government informant, at the Regional Office of the DEA located in Philadelphia, Pennsylvania. The purpose of the meeting was to develop a plan whereby the informant and Agent Davis would proceed to the vicinity of the 2500 block of Leithgow Street, Philadelphia, in the expectation of meeting one Porter Campbell, a suspected purveyor of narcotics in this particular area of the city. The plan as formulated called for Agent Davis, operating in an undercover capacity, to be introduced to Campbell by Linda Johnson. Following the introduction, Agent Davis would offer to buy a quantity of narcotics from Campbell. When and if the sale was consummated, the agents would arrest the seller for violation of 21 U.S.C. § 841.
According to plan, Agent Kean, Agent Davis, and the informant drove in an unmarked official Government vehicle to the prearranged location. Upon their arrival, Agent Kean parked the vehicle in the 2500 block of Leithgow Street. Officer Kean remained in the car and watched the informant and Agent Davis walk to the home of Porter Campbell. The proposed seller was not at home. The informant and Agent Davis left this address and were walking away when they met the defendant, who in fact knew Linda Johnson, the informant. After a brief conversation, during which the informant introduced Agent Davis as "her old man," the defendant invited the informant and the agent into a vacant house. The informant and Agent Davis waited in what would have been the living room of the house while the defendant went into another room. Shortly thereafter, the defendant returned with a brown paper bag and handed it to Agent Davis, who promptly paid $200 in official Government money to the defendant. Davis and the informant left the house and returned directly to the car. Agent Kean, Agent Davis, and the informant then drove several blocks to the vicinity of American Street and Lehigh Avenue, where they examined the bag that was received from Williams in exchange for the $200. Found in the bag were two bundles containing twenty-five (25) glassine bags each of a substance that they field tested and determined was heroin.
Both Agent Davis and a chemist produced by the Government testified in detail as to the chain of custody of the heroin from the time the 8.26 grams were purchased from the defendant until the same was introduced at trial as Government exhibits. Agent Davis testified that immediately following the completion of the field test both he and Agent Kean returned to the Office of the DEA. Testimony of the officers revealed that the evidence was processed, dated, and marked as that received from Williams, placed in a series of lock-seal envelopes, and mailed to a Federal narcotics laboratory in the City of New York for testing and custodial purposes. The chemist testified that the envelopes were received by the laboratory, that he personally broke the seal on the envelopes, and that in keeping with normal procedures he analyzed the contents of the glassine bags and found heroin therein. The evidence was then placed in another lock-seal envelope to be returned to the Philadelphia Regional Office of the DEA upon notification that the evidence was needed for trial. At the conclusion of this aspect of the testimony, there was no doubt that the chain of custody was unbroken.
Despite the strong attack on Linda Johnson's credibility, the jury apparently believed that her testimony was factual. No doubt they arrived at this conclusion because of the virtually uncontradicted corroborative testimony of Agents Kean and Davis. A review of the record indicates that more than ample evidence was introduced to support the finding by the jury that the Government had proven beyond a reasonable doubt that Ronald Williams unlawfully distributed a narcotic drug in violation of 21 U.S.C. § 841.
QUESTION OF EVIDENCE OF OTHER CRIMINAL CONDUCT
Linda Johnson, the chief prosecution witness in this case, was testifying on redirect examination when the following testimony was admitted into evidence:
"Q. You testified also, I believe, that there was no plan when the plans were formulated to buy heroin from this defendant, Ronald Williams, known as Foots?
Q. But I ask you again, are you sure that is in fact what happened?
A. Yes, that we were to get it off of someone else and he just happened to ...