After a woman is found murdered in her South Florida home, her son tells investigators that footage from the home’s security camera could hold the key to finding a killer. Dennis Murphy reports.

A small Ohio town is left in shock after a local coal miner is found fatally shot in the basement of his home. As investigators dig into his personal life, a secret affair reveals a surprising suspect.

After a nurse and mother-of-three is murdered inside her Illinois home, investigators uncover security camera footage that could be key to solving the case.

When a young mother and paramedic, Annamarie Cochrane Rintala, is found dead at the bottom of her stairs, it takes four trials and 13 years before justice is served.

New details on the latest twist in the murder-for-hire plot involving a prominent Florida family that left law professor Dan Markel dead and a grandmother arrested.

New interviews and never-before-seen evidence about the murder of Jennifer Dulos, including video and photos from residential security systems and urban police cameras that detail the timeline of the crime.

When a firefighter is murdered, the investigation unravels a web of secrets, a love triangle and stunning surveillance footage. Dennis Murphy reports.

After a 25-year-old mother is gunned down in broad daylight by a murderer wearing a disguise, detectives confront a most unlikely suspect. Dennis Murphy reports.

A monster storm had rolled into Canton, Massachusetts, and Karen Read's boyfriend, police officer John O'Keefe, was dead, his body discovered in front of another officer's house. Karen was charged with John's death. Was she to blame?