>> she had a lifetime to get rid of the clothes, to wash herself 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 wasn't sandra too frail to commit such a violent, close- quarters, crime? maybe not. the medical examiner's report concluded jaime suffered 31 sharp force wounds -- but none very deep. >> so kind of stab, stab,