A reputed Queens gang member was sentenced to 30 years in prison Wednesday after pleading guilty to fatally shooting 14-year-old Amir Griffin in 2019, prosecutors said.

Sean Brown, 21, of Jamaica, Queens, fired three shots at Griffin as the teen was playing basketball at the Baisley Park Houses in South Jamaica on Oct. 26, 2019, the Queens district attorney’s office said.

Prosecutors said Brown mistook Griffin for a rival gang member before he shot him. One of the bullets struck the boy’s upper chest and pierced both his lungs, killing him, according to prosecutors.

Brown pleaded guilty to first-degree manslaughter, second-degree conspiracy and second-degree criminal possession of a weapon last month, the DA’s office said.

He tried to withdraw his guilty plea at the last minute in court on Wednesday, but Judge Kenneth Holder denied the request, later lamenting about the gang culture that has claimed innocent lives like Griffin's.

The judge also sentenced Brown to five years of post-release supervision, prosecutors said.  

At the time of the shooting, Griffin was a freshman at Benjamin Cordozo High School, where he was expected to play for the basketball team.

Prior to Brown’s sentencing Wednesday, Griffin’s mother, Shanequa Griffin, tearfully described her daily anguish.

“He just wanted to play basketball,” she said. “I wanted to see my son become a man. I wanted to see my grandchildren.”

“People make mistakes, and I know this is one mistake you wish you never made,” she went on to say. “You took my soul from me. I haven’t slept in four to five years. I’m tired.”

Griffin’s grandmother, Kim Walston, also spoke before the sentencing.

“Amir used to visit me every day, as I reside just around the corner from him,” she said. “On that fateful day Amir was taken away from us, [it was] the one day he didn’t come to visit me.”

“Amir touched the lives of so many, giving himself without any hesitation,” she added. “He was also a promising basketball player with dreams of making it to the NBA. However, all those dreams were shattered by Mr. Brown’s decision to take that fatal shot.”

Brown, who avoided eye contact with Griffin's family members as they addressed him in court, was one of 33 gang members charged last year in one of the largest gang takedowns in the history of the Queens district attorney’s office.

The wide-ranging 151-count indictment included conspiracy, murder and other charges.

“Amir Griffin’s killer has been brought to justice, but we know the heartache continues for his loved ones,” Queens District Attorney Melinda Katz said in a statement. “No child should feel unsafe going to a park and no parent should ever have to bury a child."

“Gang gun violence has caused too much harm in our communities," she added. "We will continue to do everything in our power to get illegal guns off our streets in order to prevent another family from suffering such a tragedy.”