Snapped: Killer Couples

The 2012 stabbing death of a couple is investigated in the Season 6 opener.

The 2007 stabbing death of a porn producer is investigated.

A Canadian woman plots to have her overprotective parents killed.

A 2006 sex slaying is investigated.

The 1996 murder of a day-care worker is investigated.

A jewelry theft by two strippers turns deadly.

The 2011 attack of a family on the side of a road is investigated.

The 2010 slaying of a Florida college student is investigated.

Infidelity leads to a deadly 2013 home invasion.

A 1990 murder swirls around a teacher and her teen lover.