Crime scene: Blood splatter led to a hidden room. The detective found a woman's body, stabbed multiple times. No signs of forced entry. The husband was the prime suspect.

Detective's view: The husband seemed genuinely distraught. He claimed he was out of town. But his alibi didn't check out. He had a hidden key to the house.

Interview: Neighbor heard shouting the night of the murder. Saw husband leaving in a hurry. 

Court testimony: Forensics confirmed the husband's DNA on the murder weapon. But during the trial, a witness emerged - the real killer, hired by the husband's business rival.