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Exclusive: Family speaks after 17-year-old girl is stabbed inside Williamsburg high school

Law enforcement sources told News 12 that the teen was inside a stairwell at El Puente Academy for Peace and Justice on Tuesday when she got into an argument with 18-year-old Sanaa Thompson.

Tim Harfmann

Jun 10, 2026, 10:53 PM

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A Brooklyn woman spoke exclusively with News 12 after her 17-year-old granddaughter was stabbed inside of a Williamsburg high school.

“I thought that when my granddaughter went to school, that my granddaughter would be protected,” said Jona Jeffreys, who asked that her granddaughter not be identified.

Law enforcement sources told News 12 that the teen was inside a stairwell at El Puente Academy for Peace and Justice on Tuesday when she got into an argument with 18-year-old Sanaa Thompson.

Police arrested Thompson after she allegedly used a knife to stab the victim multiple times, including in the legs, left arm and back.

“They finished fighting and that’s when [my granddaughter] saw all of the blood located all over her,” said Jeffreys.

Jeffreys said the face-to-face confrontation started with students talking behind each other’s backs and looking for the victim to snitch.

“You know, the ‘he said, she said’ stuff,” said Jeffreys. “And [the victim] told [Thompson] she wasn't telling her anything.”

Investigators said the victim was taken to a local hospital, where she received five staples and 10 stitches. She is expected to be OK.

Jeffreys admitted to News 12 on Wednesday that her granddaughter has a history of fighting at school, including an incident three weeks ago, when she allegedly fought one of Thompson’s friends – which led to a school suspension.

“I’m not saying that my granddaughter is an excellent child and she doesn’t get into trouble, because all kids get in trouble,” said Jeffreys. “But what I'm saying is I don’t think that my granddaughter deserved to be stabbed.”

A DOE spokesperson said they’re conducting a full investigation.

Thompson is charged with assault, criminal possession of a weapon and harassment.

News 12 reached out to her attorney for comment and is waiting to hear back.

Thompson was arraigned before a judge on Wednesday and was granted supervised release. She is due back in court on Aug. 20.

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