This case is about whether statistical probabilities obtained through DNA forensic analysis using the product rule can be used as evidence in a criminal trial. The defendant was accused of rape, indecent assault, simple assault, and unlawful restraint based on DNA evidence. Many methods are used in DNA forensic analysis to identify individuals based on their unique DNA profile. The RFLP method is one such method used to compare DNA samples obtained from crime scenes to those of suspects. In this case, the defendant was found guilty of all charges based on DNA evidence analyzed using the product rule, which determines probabilities based on individual alleles. The validity of the product rule depends on whether individual alleles are statistically independent.

Commonwealth v. Blasioli (1998)
Supreme Court of Pennsylvania
552 Pa. 149, 713 A.2d 1117

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