A murderer recounts the crime that ended one life and ruined his own. Those affected, including a police officer and the victim's family, also speak.

In prison for killing her husband, a woman details her past abuse and her turbulent marriage. Her mother also reflects on their strained relationship.

Years after leaving the military, Toby Gregory claims his service and PTSD caused him to murder his wife, Inez. But Inez's family believes otherwise.

Enraged over his rebellious daughter's choice in men, an extremist father enlists his son in a terrifying plot of intimidation and murder.

Sentenced to life without parole for Jason Johnson's horrific murder, Gary Black says he has no regrets, while Jason's family finds purpose in tragedy.

After fatally shooting a coworker, Thomas "TJ" Schiffens maintains his innocence. But details surrounding the crime suggest TJ had a motive.

Ezdeth Highley reflects on her murder conviction, her transition while being incarcerated and what she's learned during her ongoing 60-year sentence.

On death row for murder, Deryl Madison reflects on his struggles with mental illness and finds support from an anti-capital punishment advocate.

Subjected to abuse throughout her life, Victoria Smith confessed to killing her husband. But someone close to the case has doubts about her admission.

Daniel Paulsrud says his fatal shooting of partner Leslie was an accident. But accounts from her family — and his handwritten notes — raise doubts.

James Walker claims he has no recollection of the 2001 murder he confessed to committing. An investigation into his traumatic past offers more context.

By helping his fellow inmates, Jamel Hatcher feels he's turned his life around — but not everyone believes his rehabilitation is genuine.

When threatening messages escalate into an assault that leaves one teen dead and another severely injured, Kimberly Dunkin reflects on her involvement.

After shooting his ex-girlfriend and her new lover, Charles Thompson is charged with manslaughter -- until his ex dies due to a hospital error.

High on a drug that fuels his paranoia, Deandra Buchanan fatally shoots his aunt, stepfather and girlfriend -- a crime he claims he can't recall.

Kenneth Foster's death sentence is commuted just hours before his execution, but he asserts that his punishment under an unusual Texas law is unfair.

Accept a plea deal or go to trial? Three men receive radically different prison sentences for their roles in the fatal shooting of a cab driver.

David Cameron Keith recalls the day he took a young hostage before heading to an airport and killing the pilot who volunteered to take the child's place.

A botched drug deal is only the beginning when Candie Dominguez assists her boyfriend, Daniel Lopez, in his gruesome killing of her cousin.

Serving 20 years in prison for a bar brawl gone awry, Walter Triplett maintains that racial profiling played the biggest factor in his conviction.

Robert Shafer and a friend target a same-sex couple in a robbery, but their crime spins out of control into kidnapping and double murder.

Remorseful about the crime that sent him to prison for life, Leo Little tells the story of the murder he committed in 1998. He is now a minister.

From a women's reformatory in Ohio, Linda Lee Couch talks about the murder of her husband, Walter, in 1984, a killing precipitated by years of abuse.

Mark Arthur maintains that he murdered a friend's father on a Houston highway for savagely beating his wife. But police have a different theory.

Makueeyapee Whitford claims the murder he committed was an act of self-defense against a rival tribe, but eyewitness testimonies tell a different story.