TV Guide Investigation Discovery Monday

The death of Toni Henthorn in an apparent hiking accident in the Rocky Mountain National Park in 2012. Her husband Harold claimed she had slipped and fallen from a cliff ledge. He stood to gain $4.5million in life insurance from the death, and three years later evidence was assembled to convict him of murder. The conviction also raised questions about his possible involvement in the mysterious death of his first wife

A case from 1977, when a Philadelphia woman went missing. Eighteen months after her disappearance, police uncovered the shocking truth of her fate, but 30 years later, the killer is still on the run

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 case of 22-year-old Liz Syperda, whose disappearance rocked the community of Mount Pleasant, Iowa. Some wondered if Liz merely left town without telling anyone, but family and friends knew something far more disastrous must have occurred