Up, to get ready for the -- the big finale. >> reporter: though not required to prove a motive, the prosecutor offered one up for the jury anyway. there was no evidence of infidelity or typical marriage troubles. still she suggested that sandra wanted out. but their religion made it impossible to split up the usual way. >> jehovah's witnesses don't allow you to divorce. unless someone's cheating, and it's very clear that jaime was not that guy. if i get divorced, i get ostracized and i can't talk with my friends. but if i kill him, and nobody finds out, i'm not ostracized. >> reporter: but was...