Family and friends packed the courtroom to hear the sentencing of Jonathan Lafontaine, accused of killing 18-year-old Brian Topoleski in 2013.
PATERSON -- A Totowa man who fatally stabbed a Cedar Grove teen in 2013 was sentenced Friday to 18 years in prison.
Passaic County Superior Court Judge Sohail Mohammed handed down the maximum sentence allowed under a plea agreement to Jonathan Lafontaine.
"I'm truly sorry for what happened...and I'm sorry for the pain I caused you," 23-year-old Lafontaine said to a packed courtroom before sentencing.
In April, Lafontaine pleaded guilty to aggravated manslaughter in the July 15, 2013 fatal stabbing of 18-year-old Brian Topoleski, who had just graduated from Cedar Grove High School.
A case of mistaken identity on a Passaic County road led to a fight in Little Falls where Lafontaine plunged a steak knife into Topoleski's chest, Passaic County Prosecutor Camelia Valdes said at the time.
The killing marked the first slaying in Little Falls in 30 years at the time.
During the sentencing, sobs and sniffles could be heard throughout the courtroom as statements from Topoleski's family members were read. Large photos of the teen throughout his life were prominently displayed in the courtroom.
"I still can't believe this is real, it would be impossible to explain what Brian's lose means to us," a statement from Topoleski's mother, Gail Topoleski said.
"It seemed that there was a misunderstanding, an exchange of words," Valdes said at the time. "Next thing you know, this tragic incident happened."
The two men did not know each, Valdes said.
Lafontaine hid in the backyard of a home for two hours before he was arrested by Passaic County Sheriff's officers.
At the time, Lafontaine, who was sentenced to three years' probation in 2012 for aggravated assault, was placed in the Passaic County Correctional Facility in lieu of $1.5 million.
After the killing, the Totowa man pleaded not guilty to first-degree murder, claiming the stabbing was an act of self-defense as Topoleski's friends threatened to kill him.
"I think those claims are ludicrous, but everyone involved expects him to try to get his client off," Robert Topoleski, the victim's older brother, said at the time.
Due to the large turnout and emotions in the case, extra officers from the Passaic County Sheriff's Office were called to the courtroom.
Before announcing the sentencing, the judge said he read every letter sent to him from the families multiple times before Friday's court date. Mohammed said he also took into consideration Lafontaine's juvenile record and previous aggravated assault arrest.
"We love you Jon," family and friends of Lafontiane shouted as he was led out of court.
Fausto Giovanny Pinto may be reached at fpinto@njadvancemedia.com. Follow him on Twitter @FGPreporting. Find NJ.com on Facebook.