In order to avoid the burden of going through a full trial before a jury that could ultimately result in severe punishments, the prosecution and defense often negotiate deals (called "plea deals") wherein the prosecution will lessen the charges levied against the defendant (or at least request a lesser sentence) in exchange for a guilty plea (thus skipping the need for a jury trial). The judge almost always accepts the deal and sentences in line with the prosecution's requests, but also has the authority to reject the defendant's plea if they find the plea deal inappropriate. This result is extremely rare, but when it happens, a jury trial follows, and the defendant must face their actual charges (not the lesser charges as negotiated).
In the video above, the defendant was accused of murdering a minor, which is a very serious crime that carries a severe punishment, but a plea deal was struck which most likely lessened the charge or at least established a minimum sentencing. At the hearing where the plea was given, the defendant was, according to the post, laughing, smiling, and generally failing to show remorse for committing a heinous crime. The victim's family is typically present at this type of hearing, so when the defendant was asked to speak and neglected to apologize or even mention the victim of his crime, the judge threw out the guilty plea and the sentencing benefits that came with it. Lessened charges are ultimately a privilege, so the lack of remorse and lack of respect shown towards the victim, the victim's family, and the court itself was reason for the judge to reject the plea deal.
tldr; the defendant was being an arrogant prick because he thought he was getting away with murder (literally), but his arrogant behavior ended up screwing him.
In order to avoid the burden of going through a full trial before a jury that could ultimately result in severe punishments, the prosecution and defense often negotiate deals (called "plea deals") wherein the prosecution will lessen the charges levied against the defendant (or at least request a lesser sentence) in exchange for a guilty plea (thus skipping the need for a jury trial). The judge almost always accepts the deal and sentences in line with the prosecution's requests, but also has the authority to reject the defendant's plea if they find the plea deal inappropriate. This result is extremely rare, but when it happens, a jury trial follows, and the defendant must face their actual charges (not the lesser charges as negotiated).
In the video above, the defendant was accused of murdering a minor, which is a very serious crime that carries a severe punishment, but a plea deal was struck which most likely lessened the charge or at least established a minimum sentencing. At the hearing where the plea was given, the defendant was, according to the post, laughing, smiling, and generally failing to show remorse for committing a heinous crime. The victim's family is typically present at this type of hearing, so when the defendant was asked to speak and neglected to apologize or even mention the victim of his crime, the judge threw out the guilty plea and the sentencing benefits that came with it. Lessened charges are ultimately a privilege, so the lack of remorse and lack of respect shown towards the victim, the victim's family, and the court itself was reason for the judge to reject the plea deal.
tldr; the defendant was being an arrogant prick because he thought he was getting away with murder (literally), but his arrogant behavior ended up screwing him.