Commonwealth v. Mattei

We granted the defendant’s application for further appellate review to consider his claim that the trial judge committed reversible error by admitting expert testimony that deoxyribonucleic acid (DNA) tests could not exclude the defendant as the source of DNA taken from the scene of the crime without accompanying testimony explaining the statistical import of those results. The defendant also claims that there was insufficient evidence to convict him of home invasion and assault by means of a dangerous weapon because the duct tape used in the attack was not a “dangerous weapon” 2 ; that his…