The woman brutally stabbed to death inside a Brooklyn check-cashing business over the weekend was attacked by her ex-boyfriend, police said. 

Cynthia McLeod, 55, was inside the business on Van Buren Street near Marcus Garvey Boulevard in Bedford-Stuyvesant around 11 a.m. Sunday when her ex-beau, identified as James Brown, 62, started railing at her about owing him money, cops and a witness said.. 

He then knifed her in the neck and torso multiple times, snarling, “Are you not dead yet, b—h? You still breathing?” during the heinous attack, according to authorities and the witness, who identified himself as Steve V. 

Brown was waiting for McLeod at the store and said, “‘You owe me money,’” Steve said. 

The victim tried to walk away but the man stabbed her in her neck and chest, he said. He also punched her and kicked her.

The murder weapon was a baby machete with a brass knuckle handle, Steve said. 

The witness said he knew the victim — and chased the stabber before tripping him and holding him for police.

“He tried to kill me too,” Steve said. “I didn’t run cause I’m used to it, I’m from the street, so I tried to grab a bottle and hit him and he started running and I chased him and I tripped him at the corner of Greene.“

Steve said cops showed up, shocked the man with a Taser and arrested him.

Brown was charged with murder and criminal possession of a weapon, according to cops.

Steve described McLeod as a nurse who was a devoted mother to her son.

“She spent a lot of money just to go to school to take care of her little homey, and look what happened,” Steve said of McLeod. “The kids got no father, nobody else. She was everything to him. His strength. She raised him right.“