Before that ruling was handed down, Brand told the judge, "Sentence me to what you're going to sentence me."
Brand received a natural life sentence for first-degree murder, a 60-year consecutive sentence for attempted murder and aggravated domestic battery and a 60-year consecutive sentence for home invasion.
The attack happened in March 2024, just a day after Brand was released on parole.
According to investigators, Brand waited for his former girlfriend, Laterria Smith, outside her Edgewater apartment before attacking her.
Cook County Assistant State's Attorney Daniel Hanichak told the judge on Tuesday, "This was an act of rage, jealousy and violence."
Smith's son, 11-year-old Jayden Perkins, was stabbed once in the chest while trying to protect his mother. He died from his injuries.
Smith, who was pregnant at the time of the attack, was stabbed 15 times.
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It all happened in front of Jayden's 5-year-old brother.
Prosecutors in court said Brand "could never be rehabilitated," calling him a "pathetic, lifelong criminal," adding that Jayden's sacrifice "put an end to the defendant's terror."
"Jayden is the hero. He is the hero out of all of this, and we appreciate the justice," said Titus Washington, Jayden's great-uncle.
Brand refused to come to court and attended via Zoom. He objected frequently during his sentencing hearing, which went on for hours, as he had during the trial. On Tuesday, all of his objections were overruled.
In a victim impact statement, Smith told the court, "The pain you have done to me and my son is indescribable. The pain I have to live with the rest of my life. You destroyed my life."
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Jayden's father, Christopher Perkins, also made a statement, saying, "You shouldn't have touched my baby... You are gonna pay for what you did. You think it's over this court date."
The judge stopped his statement, deeming it threatening, and asked Jayden's father to leave court.
Christopher Perkins could be heard crying in a hallway outside the courtroom but was allowed to return and apologized to the judge.
"I miss my baby, bro. It's senseless," he said. "It ain't going to be a lot of relief. We still missing my baby. It's just a little bit of closure for us, that's all."
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During the weeks-long trial, Brand represented himself and told jurors it was Smith who had the knife and stabbed her own son.
Jayden's family members left the court at times during the emotional trial.
The jury ultimately found Brand guilty on all charges in June.
Following the tragedy, two members of the Illinois Prisoner Review Board stepped down.
Family members of Smith and Jayden were seen entering the hearing on Tuesday. They were present throughout the trial.
Smith and her family members have been pushing for change in the way domestic violence cases are handled in Illinois in an effort to prevent other tragedies.
Brand said he plans to appeal and agreed to be appointed a public defender in those efforts.
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