Raised in an environment of drug addiction and crime, teenager Justin Dickens commits murder but disputes the prosecutor's version of events.

No one -- including David Lewis himself -- disputes that he committed murder. But Lewis's mental fitness remains in doubt despite his death sentence.

Teenage drug abuser Joshua Nelson murders a friend in cold blood to steal his car, but other shocking motivations for the crime emerge at his trial.

Kansas native Cavona Flenoy agreed to a date with a liquor store clerk, but the evening took a deadly turn when he tried to assault her.

Higinio Gonzalez killed a store clerk during an armed robbery at the age of 16. He swears it was an accident, but one county attorney isn't so sure.

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.

Sentenced for a triple murder linked by police to Satanism, Miguel Angel Martinez becomes the youngest person ever on death row in Texas.

Convicted for killing his grandmother, Rex Groves insists he no longer holds murderous thoughts towards his family. But their trust isn't easily won.

After years in solitary confinement, James Robertson admits to murdering his new cellmate as an escape to the better conditions on death row.

Convicted murderer Wayne Doty admits his guilt but requests that his execution be carried out by electric chair, a method no longer used in Florida.

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.

After an unsuccessful attempt to kill his father, drug user Charles "Billy" Armentrout later murdered his grandmother and was sent to prison for life.

Young love takes a dark turn when Ashley Morrison's plan to run away with her boyfriend, Christian Sims, results in the murder of his grandmother.

Toby Williams murdered Deborah Moore and shot her husband, John, in a cruel 1984 robbery for which he has been on death row for nearly 35 years.

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.

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

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.

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.

In 1996, David Barnett murdered his adoptive grandparents, stabbing them over 20 times. Later, he revealed years of abuse at the hands of his father.

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.

After 24 years on death row, Joseph Murphy saw his sentence commuted a week before his execution due to the extreme abuse he suffered as a child.

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

One of the small number of women who commit murder, Lindsay Haugen claims that she strangled her depressed boyfriend in 2015 as an act of mercy.

At a New Year's Eve party in 1996, Brandon Hutchison killed two brothers, a crime he admits — but there are conflicting versions of the story.