A judge has blocked a daughter's plea to watch the execution of her father, Kevin Johnson Jr, who is due to be put to death by lethal injection on Tuesday for the 2005 murder of police officer William McEntee.
The judge refused 19-year-old Corionsa "Khorry" Ramey's appeal to attend her father's execution because the law in Missouri states that she is too young to see his death sentence carried out.
Last week, the American Civil Liberties Union (ACLU) filed a lawsuit on her behalf, they claimed that the ruling was a violation of Ms Ramey's constitutional rights under the First and Fourteenth Amendments
However, US District Judge Brian Wimes rejected the lawsuit in a written ruling, he said that the law does not violate her constitutional rights and that it is "in the public's interest" to allow states to enforce their own laws.
Ms Ramey spoke out after the ruling, saying she is "heartbroken" that she cannot be with her father during his final moments of life.
She said: "I'm heartbroken that I won't be able to be with my dad in his last moments.
"My dad is the most important person in my life. He has been there for me my whole life, even though he's been incarcerated. He is a good father, the only parent I have left.
"He has worked very hard to rehabilitate himself in prison. I pray that Governor Parson will give my dad clemency."
Johnson is set to be executed on Tuesday - after spending almost 20 years on death row for shooting Kirkwood police officer William McEntee to death.
Johnson was 19 years old when he shot dead Mr McEntee - ironically the same age as his daughter is now.
The murder took place in July 2005 when McEntee and a group of other police officers were serving an arrest warrant on Johnson for a suspected probation violation. When police arrived at Johnson's home, his brother, 12-year-old Joseph Long, ran to their grandmother's house next door and collapsed from a seizure - he suffered from a congenital heart defect.
The boy was taken to hospital where he tragically died.
Several hours later, McEntee was responding to an unrelated incident in the same neighbourhood and encountered Johnson - who shot and killed the officer - shooting him once when he saw him and then again after he had collapsed on the floor.
Johnson, now 37, testified during his trial that McEntee had blocked their mother from rendering aid to his younger brother and that he blamed the officer for his death.
Johnson's legal team are campaigning for him to be granted clemency, arguing that he should be granted a stay of execution because his conviction and sentence was "infected by racism" from the start.