I am natalie morales. the prosecution made the argument that bob ferrante certainly had the means to kill his wife. now, it was the defenses turn. and their goal was to dismantle the largely circumstantial case presented. questioning the motive and whether she even died from the poison at all. now, with the conclusion of lethal weapon, here is dennis murphy. >> the commonwealth of pennsylvania had tried to paint robert ferrante as a jealous husband, driven by a rage to points in his wife. how did he do it? prosecutors believed he slipped the cyanide inside of a drink. give it to her shortly af...