4x2 - Unnatural Causes

October 18, 2011

South California is the perfect place to retire, but when an 84-year-old is brutally raped and murdered in her senior living community everyone is a suspect. To find her killer, the investigation goes global as the suspect does his best to slip away.

4x3 - Road to Murder

October 25, 2011

An 18-year-old runaway is found raped and strangled to death on the side of a San Diego road. Tracking down the cold-blooded killer will take years of detective work and a benign connection.

4x4 - In Plain Sight

November 1, 2011

In Colorado, a lifelong bad boy comes home to finds his wife, savagely raped and strangled to death. Evidence indicates the attack is personal. But is the husband is trying to get away with murder or could someone else be involved?

4x5 - Friend or Foe

November 15, 2011

Murdock Nebraska, a man returns home to find his mother and father shot to death. Nothing of value is missing. Everyone in town is stunned by the news and they begin to wonder, is the killer someone they know?

4x6 - Shot in the Park

November 22, 2011

Minneapolis, Minnesota is a haven for its large gay community, until gunfire rips through the city leaving two men dead. An eyewitness leads investigators to a suspect, but soon after, an anonymous letter points to an anti-gay hate group on a mission.

4x7 - The Rolex Murder

November 29, 2011

Miami's Coconut Grove rarely sees trouble. Until Jos? Calvo, a family man, is shot in the head and robbed of his Rolex watch. What appears to be a random cash grab turns into a sinister mystery. Is this a robbery gone bad or a murder for hire?

4x8 - Home Invasion

December 6, 2011

Aiken, South Carolina, is a tiny peaceful town where nothing much happens. Until Jessica Carpenter, 17, is found raped and murdered in her living room. The neighborhood goes on high alert while police swing into action to catch her killer.

4x9 - The Day the Music Died

December 14, 2011

Austin is famous for its music scene and party spirit--until a single mother is savagely beaten in her sleep. With no leads, and a culture that distrust authority, 21 years pass before investigators get a stunning phone call that turns the case red-hot.

4x10 - The Lost Boy

December 20, 2011

In one of the most notorious missing children cases, Adam Walsh, 6, steps into a stranger's car and disappears. A manhunt is launched but Adam's severed head is found two weeks later. More than a quarter of century passes before the mystery is solved.

4x11 - Framed

April 5, 2012

A horrendous miscarriage of justice made all the more famous by the book The Innocent Man - Murder & Injustice in a Small Town by John Grisham. In Ada Oklahoma, 21-year-old Debbie Sue Carter is found raped, beaten and strangled in her apartment. A quest for justice thrusts Ada into the national spotlight and leaves a family wondering for a quarter of a century - who killed Debbie Carter?

4x12 - On Her Own

April 12, 2012

Winston-Salem in 1982 is a city divided by race. And when a young white copy editor is raped and stabbed to death blocks from where she worked, the atmosphere is tense. Twenty years pass before Deborah Sykes' killer finally faces justice once and for all.

4x13 - Evil Twin

April 19, 2011

Shock waves ripple throughout Clearwater, Florida, when an attractive waitress is found on her bedroom floor stabbed 16 times. As years pass and the case goes cold, police fear DNA might not even find justice for Laurie Colannino.

4x14 - Shot in the Dark

April 26, 2012

A budding college football player's life is cut short when his 21st birthday party ends with his brutal murder. A gun shot to the head with a bullet wound so exact that Lexington police think it looks like a hit. But who would want to kill Trent Digiuro?

4x15 - Murder on the Menu

May 3, 2012

When Jim Webb, Co-Owner and Head Chef of the General Wayne Inn outside of Philadelphia, is found shot to death in his office, police hatch a plan so risky it could mean letting a killer run free forever.

4x16 - Park Slope Justice

May 10, 2012

A murderous attack in Park Slope, Brooklyn, leaves Sylvia Lugo dead and her girlfriend, Amanda Leach, raped and shot in the leg. Police struggle to pin down an assailant without any hard evidence, resulting in Leach being pegged as the prime suspect.

4x17 - Philadelphia's Night Stalker

May 17, 2012

When Wharton business student Shannon Schieber is found raped and strangled to death in her Philadelphia apartment, the city errupts with outrage as it's discovered that Shannon's death is the the latest in a string of rapes in the Centre City area.

4x18 - Dreams that Kill

May 24, 2012

4x19 - Nightmare in Nashville

May 31, 2012

A McDonalds restaurant manager is murdered in a small Tennessee town and the police force goes into overdrive. But with a big list of suspects investigators are baffled and the case goes cold. Two years later, a tip brings them to Delma Ramsey's killers.

4x20 - The Truth Hurts

June 15, 2012

Palo Alto's community sympathize with wealthy property developer Ken Fitzhugh when his wife of more than 30 years, Kristine, falls to her death down the basement stairs. But police are suspicious from the get go: there is just too much blood at the scene.