Vanessa Bulls, the former mistress of Waco, Texas, minister Matt Baker, testifies that he murdered his wife, Kari, in 2006 and tried to make it appear as if she committed suicide.

The murders of teens Amber Dubois and Chelsea King in California in 2009 and 2010, respectively, are investigated.

An investigation into the alleged criminal activity of 19-year-old Colton Harris-Moore, dubbed the Barefoot Bandit.

The 2009 stabbing death of wealthy Ohio physician Peter Franklin is investigated. The victim's wife, Sandra, admits to stabbing him but she claims it was in self-defense.

The 2002 murders of two men, Michael Tardio and Chris Monson, gunned down in Studio City, Cal., are investigated. The probe leads from the Playboy Mansion to Europe to a scandal on Wall Street.

Three Texas women use Facebook to investigate the disappearance of their friend Lisa Stone, who vanished in June 2010.