A mother has revealed how she forgave her son for murdering her 4-year-old daughter when he was 13 and why she continues to visit him in prison a decade after the attack which he launched in revenge against her.
Charity Lee was at her waitressing job in Abilene, Texas, on February 5, 2007, when police arrived to tell her her 4-year-old daughter Ella was dead.
The child had been stabbed 17 times by her brother, Paris, who was 13 at the time.
Paris picked up the knife and attacked his half-sister as she slept in her bed after convincing their babysitter to go home. He then called 911 and admitted to the killing.
He later told his mother that he carried out the murder to "destroy" her in revenge, the Daily Mail reports.
The operator responded: "You think you killed somebody?"
Paris, through sobs, cried back: "No I KNOW I did.
"My sister...I feel so messed up."
He was taken into custody before authorities alerted Charity to what had happened.
He told her first that he had suffered a hallucination but then later claimed he was in his right mind when he stabbed Ella and said it was for revenge against their mother.
"I sometimes have to say to myself [during visits]: 'Okay, Charity, take a breath, you know how Paris is wired,'
"But I am not going to be that parent who abandons their kid," she told The Post.
In the trailer for the documentary, she said: "Paris knows somewhere inside of him, he is dark."
To cope with her grief, Charity set up The Ella Foundation, a nonprofit organisation which empower people affected by violence.
She was prompted to set it up in part when in 2007, a month after Paris's arrest, the Texas Youth Commission, which had been looking after him, was indicted for the physical and sexual abuse of children in its care.
Now, she visits prisons to speak about how to respond to violence in ways which can improve a person's life instead of destroy it.