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Jonaiki Martinez-Estrella, gang member resentenced in ‘Junior’ stabbing death, dies in prison

Martinez-Estrella was convicted of second-degree murder, second-degree conspiracy, and second-degree gang assault.

Bob Doda

and

Tim Harfmann

Jun 29, 2025, 10:42 AM

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Jonaiki Martinez-Estrella, a gang member convicted of killing 15-year-old Lesandro “Junior” Guzman Feliz in 2018, has died in prison. He was 31 years old.

“I feel peace because my son deserved justice,” said Junior's mother Leandra Feliz. “[Martinez-Estrella] abused my son.”

Documents released by the Department of Corrections and Community Supervision listed him as deceased. Officials said Martinez-Estrella was found unresponsive Friday afternoon inside of his cell at the Coxsackie Correctional Facility, but his official cause of death has not yet been released.

“I don’t want to be happy, but he deserved it,” Feliz said.

Martinez-Estrella was convicted of second-degree murder, second-degree conspiracy, and second-degree gang assault. He was resentenced for the murder charge in May and was serving 25 years to life with the possibility of parole.

The new sentencing came after the New York State Supreme Court tossed the first-degree murder conviction and wrote that prosecutors did not prove an essential element of the crime - that the defendant inflicted torture on Junior.

News 12 Feature: Justice for Junior

“[Martinez-Estrella] was fighting for his freedom, and now he’s going to have freedom in hell with the evil,” Feliz said.

On the night of June 20, 2018, Lesandro 'Junior' Guzman-Feliz was fatally attacked outside a Bronx bodega. The 15-year-old was chased down the street, dragged out of the Belmont bodega where he sought refuge, and stabbed and slashed multiple times by his attackers, one of which used a machete. The entire attack was caught on surveillance video.

“He decided to be a gang member, so the gang only has two roads – the jail or the cemetery,” Feliz said.

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