In this new documentary for ITV's Crime & Punishment strand, Susanna Reid travels to Texas, home of the most active death chamber in the United States, to meet Death Row inmate Darlie Routier, who denies murdering her two young sons.
For 23 years, Dallas housewife and former cheerleader Darlie has claimed she had no part in the murders of both sons, who were stabbed to death just a few feet away from where she was sleeping.
Darlie was convicted and sentenced to death by legal injection for killing one of her sons, and remains accused of murdering the other - despite there being no eye witnesses, no confession and no motive.
Decades on, Darlie has refused a route off Death Row in exchange for her accepting her guilt.
In this documentary Susanna goes on a journey, delving into the history of the case, meeting key witnesses and family members, to find out if she is as innocent as she claims.
Could this be one of the greatest miscarriages of justice or is Darlie a dangerous, manipulating embodiment of evil who killed her own children and tried to blame it on an intruder by slitting her own throat?