TV Guide Investigation Discovery Tuesday

Buying goods from the comfort of home

Buying goods from the comfort of home

Buying goods from the comfort of home

Buying goods from the comfort of home

The Pennsylvania family decimated when masked men ambushed it at home with guns and crude bombs, killing a mother and her daughter. The shell-shocked survivors pointed the finger at one of their own, but lack of evidence stalled the case for 30 years

The case of mother-of-three Patty Vaughan, whose blood-stained minivan was found abandoned at a roadside on Christmas Day 1996, 20 miles from her home in Texas. Police considered the possible involvement of her ex-husband in her disappearance

When Lea Porter vanished in Prison Valley her relatives turned detective to try and find her. Their investigation led to the realisation she had been murdered. As the killer evaded arrest, Lea's brother devised a plan to make him confess

The killing of Sandra Miles by her daughter. Tracie Lynn Miles testified she was under the influence of an abusive boyfriend - who was also convicted in the 1998 strangulation and bludgeoning death

The story of 20-year-old Virginia Tech student Morgan Harrington, who disappeared at a Metallica concert in 2009. Three months later, the heavy metal fan's battered body was found 10 miles away, but police were unable to identify any suspects for her murder

The presenter recalls a case from 2004, when a daycare provider in Oregon was alarmed when two-year-old Karly Sheehan, who appeared to be losing her hair, claimed she was being abused at home

How a fortuitous arrest led to the identification of a new suspect in the investigation into a young woman's murder. A subsequent confession of forbidden love caused detectives to re-evaluate everything they knew about the case