The father of Austin Metcalf, who was fatally stabbed at a track meet by Karmelo Anthony, referred to his son's killer as a 'Watermelon Felon' in a blistering tirade against him and his family. 

Jeff Metcalf spoke to the JinxedSip podcast on Wednesday after a gag order forbidding either side from speaking out expired following the conclusion of the trial.

The case sparked fierce debate about the role of race in the justice system, with public discussion often focusing on the fact that Metcalf was white and Anthony is black.

A third of the way through the three-hour-long episode, Jeff appeared to reference this discourse and used the racist term to describe Anthony.

'Let me make one up, let me make something racist up so y'all can go viral,' the father started. 

'I have a new name for Karmelo, because he was such this little boy y'all were trying to portray. How about "watermelon felon," how's that one strike you?

'I hope he enjoyed that first night in that cell last night, because he's going to have many nights to think about what the f**k he did.' 

Jeff previously said he forgave his son's killer, but said now that the 'muzzle's off' he was going to make his feelings known. 

He had choice words for Anthony's parents Drew and Kayla Anthony, who he branded 'grifters' and 'cowards.'  

'You wouldn't even show up for your son's sentencing or [the] victim impact statement, you abandoned your kid, you left him there!' Jeff said, while raising his voice. 

'I guess he's no more use to you because he can't get you more GoFundMe money or GiveSendGo money. You are grifters! You should be ashamed of yourself.

'You never once took accountability. You tried to play victim. The real victim is the one who died, not the one who shoved a knife in his chest.' 

Jeff's son was stabbed to death by Anthony following a confrontation at a track meet on April 2 last year. Metcalf died in his twin brother's arms in the Frisco, Texas stadium's stands.

Anthony's team claimed he was acting in self-defense and the racial element to the trial sparked fierce debate, prompting the judge to issue a gag order. 

Jeff said being forced into silence during the trial was like being 'tied to a chair and someone is slapping your face back and forth,' but insisted he has forgiven Anthony.

'Vengeance is mine,' the father said. 'I can speak freely now, because the gag order is lifted.

'You have to let that stuff go or it will kill you, it will eat you up inside,' he admitted. 'So when people ask me: "How can you forgive him?" If I didn't, I would have wound up killing him and ending up in prison myself.' 

He also accused Anthony's parents of widening the 'racial divide' and teaching their children 'racism.' 

'Do you program your kids to hate?' he asked. 'To kill?' 

'From day one, I said this was never about race. Please, don't make it about race and don't politicize it. And what did you do? You choose both. You have embarrassed your own culture and race.' 

Jeff later said he was 'racist against a**holes.' 

'I don't like them, but I could care less about the color of your skin,' he said. 

'Drew Anthony, you are a p***y and a coward and you raised one. Kayla, what did you do to that boy to make him stab somebody? My god, what kind of mother are you?' 

Anthony's family said 'nobody wins' after the jury rejected his self-defense claims and sentenced him to 35 years in prison on Tuesday.

'It's unfortunate, it's where nobody wins. We've all been hurt by this. Everybody, everyone,' Drew told CBS Mornings.  

Kayla insisted to CBS Mornings after the sentencing that her son 'didn't mean to hurt anyone.' 

The parents also claimed witnesses gave inconsistent statements and claimed the jury did not have any black people on it.

House Democrats are also raising concerns about the jury selection process after several argued the racism could have influenced the verdict. 

Many have taken offense to what critics said was the all-white jury, as it lacked diversity and said it made the trial unfair. 

'First of all, they need to reopen it and all the evidence needs to come forward,' Illinois Representative Jonathan Jackson said, according to Fox News. 

Anthony has launched an appeal of the verdict, court records showed. 

His lawyer, Mike Howard, told TMZ that his legal team told the court that they would be appealing right after the trial concluded.

'We believe there are several important issues for the appellate courts to consider. An appeal is the next part of the legal process and a right afforded every American,' Howard said.

Anthony, who was 17 at the time of the fatal attack, sobbed in court on Tuesday and his family burst into tears as the judge handed down the verdict.

His mother begged the jury to show him mercy as an audible gasp was heard inside the courtroom when his sentence was handed down hours later.

Throughout the trial, Anthony and his legal team have claimed that he stabbed Metcalf in an act of self-defense after they got into a confrontation during a rain delay at the sporting event.

Metcalf called out Anthony for standing under a tent that did not belong to his school, the Frisco Police Department said.

Anthony had originally faced between five to 99 years in prison for knifing Metcalf, but after the verdict was returned at the Collin County courthouse, prosecutors agreed to allow the jury to consider 'sudden passion' as a factor when determining his sentence.

'Sudden passion' is a legal term in Texas that allows a criminal to argue they were in an intense emotional state when they committed wrongdoing. It would have reduced Anthony's sentence to that of a second-degree felony for which he could have served as little as two years behind bars.

However, the jury rejected the argument and spent less than three hours passing its guilty verdict, and another roughly two and a half hours before they handed down their sentence.

Anthony will now have to serve at least half of the sentence before he is eligible for parole.

The Daily Mail has reached out to Jeff and the Anthonys' lawyer for comment.