a camera was rolling as prosecutor fran humphries began his case. >> this is purely motive evidence thates a motive for richard gagnon to end the lives of these two people. >> as humphries recalls, the case against rick was always motivation strong, evidence weak. not much more than a drop of charlie parker's blood on a shoe when you came right down to it. even so, humphries told the court, the blood put rick at the murder scene. >> but he had a story for it, didn't he? >> he did. it didn't hold water, but he had a story about it. >> humphries recited rick's version of how blood had got on his shoe, how he had went into the parker house to get a set of car keys after the crime scene techs had finished up. >> he looked to his right which was the window leading in to the bathroom where big charlie had died and noticed the blood. >> rick said he worried bambi pacing outside might look in the window and freak out all over again. >> he went in and stepped through the bathroom and closed the blind. >> and, oops, i stepped in the blood. >> yeah. >> that's his story, though, right? >> yeah. >> b