Commonwealth v. Knox, J., Aplt.

OPINION

Justice SAYLOR.

This appeal concerns a criminal defendant’s accountability for the illegal possession of a firearm by another, under accomplice-liability theory.

The facts underlying this appeal are cumbersome. In general, they reflect a recurring scenario in which a defendant (presently, Appellant) is charged with a possessory weapons offense deriving from the role of a firearm in a broader criminal undertaking, although, factually, another person (here, Appellant’s brother) actually possessed the weapon during the episode and the defendant himself was unarmed. See generally State v.…