
Though wedded couples vow to stay together until death do they part, a look at what happens when a groom or bride causes their beloved's death.

Melanie and David Clark's marriage was volatile, passionate and sometimes abusive; it ended when one of them snapped and picked up a knife.

Steven McDowell refused to accept that his marriage to Crystal was over; when she disappeared during a hurricane, efforts to uncover foul play were hampered.

Omar Murray worked hard to give his wife Alisha everything she wanted; it wasn't enough, and Alisha decided he was worth more dead.

When Arlene Fraser disappeared, her husband Nat had a watertight alibi; local cops weren't fooled.