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Update, Oct. 4, 2023 at 4:28 PM:

Police are searching for a woman who was seen with a teenager who fatally stabbed a Brooklyn activist early Monday.

According to Chief of Detectives Joseph Kenny, Ryan Carson, 32, was walking home with his girlfriend, Claudia, when they encountered an “emotionally disturbed” teenager who threatened to kill Carson.

Police know the identity of the 18-year-old public school employee who ransacked his girlfriend’s apartment 2 months ago.

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According to Chief Kenny, the teen suspect was with a woman believed to be his girlfriend prior to the murder.

Kenny told amNewYork Metro that the suspect and his girlfriend had an argument prior to the attack. The argument may have triggered him and sent him into a fit of rage.

“We have received several leads in regards to this case and have developed a suspect,” Chief Kenny added. “Detectives are working with our partners in the Kings County District Attorney’s office and we are trying to establish probable cause to make this arrest.”

Shocking video footage shows the suspect walking past Carson and Claudia as they sat on a bus bench at Lafayette Avenue and Malcolm X Boulevard in the city’s Bedford Stuyvesant section around 3:50 a.m. Monday.

Moments later, the couple stood up and walked in the direction of the suspect. After knocking over scooters, the suspect is heard saying, “What the f–k you looking at?” as Carson asked him to “chill out.”

The suspect yelled, “I’ll kill you n*gga!” before punching Carson in the face and lunging at him with a butcher knife. Carson turned and tripped over the same bus bench he had been sitting on 30 seconds earlier.

As Carson fell to the ground, the suspect stabbed him multiple times in the chest, piercing his heart with the knife.

Claudia pleaded with the suspect to stop, but he spat in her face and kicked Carson who lay mortally wounded on the sidewalk.

A woman approached Claudia and apologized for her boyfriend’s random act of violence. “Go watch him. Go watch him,” Claudia told the woman in a protective tone.

Carson was a Black Lives Matter supporter and a self-professed member of Antifa. He created the “No OD NY” campaign to develop safe injection sites for drug addicts to prevent overdoses.

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Carson’s friends say he would feel sorry for his killer, and he would’ve thought of him as a “victim of a broken system” in NYC.

“I’m absolutely positive that he would immediately see that this was a person who was suffering from a lack of resources in our community, who probably needs better mental health support, possibly housing, possibly drug support, drug treatment,” New York State Assembly member Emily Gallagher told The Gothamist.

A GoFundMe account raised over $51,000 for Carson’s girlfriend.

In now locked social media accounts, Claudia supported Black Lives Matter and professed her hate for police. In one photo, she is seen wearing a shirt with the acronym ACAB for “All Cops Are Bastards.”

Claudia reportedly refused to give police a description of the suspect, only describing his behavior. She later told a friend the suspect was “a kid.”

Watch the video below. CAUTION: This video contains graphic violence and may not be suitable for all viewers.