In 2009, police uncover the most grisly murder scene in New Mexico history. An unprecedented investigation leads to a serial killer on the loose.

Mexican immigrant Felipe Ulloa never returns after going to a local bar to collect a $75 debt, then his charred remains are found in a burnt-out vehicle; even though homicide cases are difficult to close in immigrant communities, detectives prevail.

It is 1997, the suburbs of Seattle. A dead body is found in a park. When police go to inform the victim's family, they trip on the scene of a massacre. Their investigation leads them down the demonic path of the Seattle Goth scene.

The deadliest mass shooting in U.S. history: On June 12, 2016, 49 people are killed in Orlando's Pulse nightclub. Maria Elena Salinas explores how survivors made it through the ordeal while uncovering groundbreaking information about the shooter.

When Mary Rose's 15-year old daughter, Annette, takes up with 41-year old Felix Vail in 1981, Mary is concerned. But it's not until Annette disappears three years later without a trace, that Mary begins to discover Felix Vail's dark history.

When Hurricane Ivan hits the Florida coast in 2004, Michelle Jones invites her Aunt Teri and Uncle Charlie to stay - but it turns into something darker.

In Corvallis, Ore., a daycare provider grows alarmed when bright and energetic toddler Karly Sheehan starts exhibiting strange new behaviors, while, at the same time, she appears to be losing her hair.

María Elena Salinas expores a unique view of justice in Detroit while investigating the case of a house raked with bullets, in which four people were killed and one injured.

When 22-year-old Erin Belanger and her boyfriend, Francisco Flacco Roman, move to Deltona, Fla., they're hoping for a new start, but little do they know that danger awaits them.

In 1990, teenager Martin Tankleff is convicted of murdering his parents after confessing to the crime, then, he spends 20 years trying to prove his innocence.