Throughout the history of capital punishment in America, states have reviewed and revised execution methods in the interest of finding a more "humane" option. Ohio, Arizona and Oklahoma are among the states where lethal injection executions have gone horribly wrong. What's life like for those executioners who are paid to end the lives of others...especially when it doesn't go according to plan?

Two construction workers are brutally attacked in San Antonio. One survives and is able to identify his assailant. Ruben Cantu was a 17 year old from Texas who was executed after being convicted of the brutal murder - a conviction based on a questionable evidence. Did they execute the right man?

The execution-style killings of a Florida nightclub owner and two aspiring models are caught on camera. All three found dead, side by side, killed execution style. The crime was caught on videotape, but was the wrong man sent to death row?

An investigation into the brutal murders of a California family in their home in Chino Hills, CA. A getaway car. A hatchet. A bloodstained shirt. Did Kevin Cooper kill the Ryen family -- or was he framed?

In 1986, a fire engulfed the home of newlyweds in Paris, IL, with them inside, but the fire was intended as a cover-up: The couple had been stabbed to death before the arson. Flawed evidence. Conflicting accounts. Leads that were never followed. Recantations. How does a double homicide case become too politically sensitive? And how did an innocent man end up on death row for almost 20 years?

A Texas mother is sentenced to death after being convicted of murdering her two young sons in their Dallas-area home.