Appellant, Efrain Martinez, appeals from the judgment of sentence imposed after his conviction for unlawful delivery of a controlled substance. 1 Appellant claims that the trial court erred in permitting the Commonwealth’s introduction, in its case in chief, of evidence of appellant’s subsequent criminal activity. 2 We agree and, therefore, grant appellant a new trial.
The following facts were adduced at trial. At approximately 7:20 p.m. on May 1, 1978, Officer Joel Hicks and an informant, Stephanie Lynch, entered DiNunzio’s Spaghetti House in Lebanon, Lebanon County. Shortly thereafter, Miss Lynch was approached by appellant, who engaged her in a private conversation. Following this conversation Miss Lynch, appellant and Officer Hicks left the spaghetti house and pursuant to appellant’s directions drove Officer Hicks’ van to Seventh and Lehman Streets. Upon their arrival and in response to an inquiry by appellant, Officer Hicks gave appellant a one hundred dollar bill and said that he wanted to purchase a fifty dollar bag of heroin. Appellant exited the van and walked outside Officer Hicks’ and Miss Lynch’s range of vision. Less than one-half hour later appellant *124 returned to the van carrying a tin foil packet containing a brownish powder, 3 a small jar of water and fifty dollars. Appellant gave the foil packet and money to Officer Hicks, and offered him a syringe and water with which to inject the heroin. Officer Hicks ignored appellant’s offer and, at appellant’s request, left appellant in the vicinity of the William Penn Bar.
Appellant was charged with the unlawful delivery of heroin 4 and tried before a jury on September 5 and 6, 1978. For the limited purposes of showing state of mind and intent the trial court permitted the prosecution to introduce evidence of a second sale of heroin allegedly made by appellant in DiNunzio’s Spaghetti House on May 19, 1978. The charges filed against appellant for the alleged subsequent sale of heroin were unresolved at the time of trial. 5 The jury rendered a guilty verdict, following which appellant filed post-verdict motions alleging, inter alia, that the evidence of the later sale had been improperly admitted. Appellant’s motions were denied on June 7, 1979, and this appeal ensued.
“It is well established that evidence of other criminal activity generally is inadmissible against a defendant at his trial on another charge.
Commonwealth v. Roman,
The Commonwealth first argues that evidence of the subsequent sale was admissible in its case in chief to show appellant had the “intent to deliver.” Record at 12a. “An intent is a mental state, which can be inferred from conduct.”
Commonwealth v. Abney,
[W]hen the crime charged involves the element of knowledge, intent, or the like, the state will often be permitted to show other crimes in rebuttal, after the issue has been sharpened by the defendant’s giving evidence of accident or mistake, more readily than it would as part of its case in chief at a time when the court may be in doubt that any real dispute will appear on the issue.
McCormick on Evidence,
§ 190 at 452 (Cleary Ed. 1972) (emphasis added).
See also Commonwealth v. Bond,
We also recognize that the other crime introduced by the Commonwealth occurred
subsequent
to the crime being tried. Moreover, appellant had not yet been convicted of this later sale at the time of trial.
See generally Commonwealth v. Bond,
The Commonwealth also contends that evidence of the alleged subsequent sale of heroin was admissible to show appellant’s “state of mind.” Record at 7a, 34-35a.
8
Evidence of an unrelated crime is admissible to show state of mind only when it is “ ‘so close in time to the alleged offense as to have bearing upon [the accused’s] state of mind at that time.’ ”
Commonwealth
v.
Bradley,
Accordingly, we vacate the judgment of sentence and remand for a new trial.
Notes
. The Controlled Substance, Drug, Device and Cosmetic Act, April 14, 1972, P.L. 233, No. 64, § 13, eff. June 14, 1972; 35 P.S. § 780-113.
. Appellant raises two additional claims for relief. First, appellant contends that the trial court erred in refusing to grant a mistrial after the prosecutor allegedly implied in his opening statement that appellant would testify. Second, appellant argues that the prosecutor’s misstatement of the legal grounds for entrapment constituted prejudicial error. Since we find that the evidence of appellant’s subsequent criminal activity was improperly admitted, it is unnecessary for us to address these claims.
. Subsequent laboratory tests conclusively established that the substance in the packet was, in fact, heroin.
. See note 1 supra.
. Appellant was subsequently convicted of this second offense. His conviction was affirmed by this court in
Commonwealth v. Martinez,
. Pennsylvania has adopted the objective test for entrapment.
Commonwealth v. Jones,
. This general standard is also applicable to the admissibility of prior offenses.
See Commonwealth v. Brown,
. The Commonwealth did not attempt to admit the evidence to establish a common scheme or plan, to establish appellant’s identity as the seller, or to show absence of mistake. Appellant admitted both that he was a regular user of heroin and that the substance he delivered to Officer Hicks was heroin. Record at 71a, 76a-77a.
. In a case involving credibility such an error clearly is not harmless.
Commonwealth v. Walls,
