Summary

Stephen Zappala, Sr. Commonwealth v. Abu-Jamal (521 Pa…

Implicit in the fact that the statute assigns to the defendant the burden of proving mitigating circumstances by a preponderance of evidence is the understanding that the jury is to asses the evidence for credibility. It must be left open for the Commonwealth to challenge the veracity of facts asserted and the credibility of the person asserting those facts, whether that person is a witness or the defendant.
Source: Wikisource

Stephen Zappala, Sr. Commonwealth v. Abu-Jamal (521 Pa…

We agree with the Commonwealth that mere disparity of number in the racial make-up of the jury, though relevant, is inadequate to establish a prima facie case. The ultimate composition of the jury is affected not only by the prosecutor's use of peremptories, but by the defendant's use of such, by challenges for cause (more acute in capital cases because of the Witherspoon inquiry) , and by jurors' inability to serve for personal reasons. The Commonwealth cites at least one instance where the appellant removed a black juror already passed as acceptable by the Commonwealth
Source: Wikisource

Stephen Zappala, Sr. Commonwealth v. Abu-Jamal (521 Pa…

Bias is a term used in the "common law of evidence" to describe the relationship between a party and a witness which might lead the witness to slant, unconsciously or otherwise, his testimony in favor of or against a party. Bias may be induced by a witness' [sic] like, dislike, or fear of a party, or by the witness' [sic] self-interest. Proof of bias is almost always relevant because the jury, as finder of fact and weigher of credibility, has historically been entitled to assess all evidence which might bear on the accuracy and truth of a witness' [sic] testimony.
Source: Wikisource

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