HIGHBRIDGE, the Bronx (PIX11) — Justina Cruz spoke fondly about 45-year-old Bronx resident Tyrone Quick, who she said died trying to protect her and her neighbor Vanessa Guzman.

Cruz said the suspect is her next-door neighbor, who she believes is mentally unstable. The next-door neighbor, 65-year-old Jose Ortiz, stabbed Guzman with a knife Friday night inside her apartment building on University Avenue in Highbridge, according to police.

“He stabbed her right here, which could have went right to her heart,” said Cruz.

Guzman survived. But Cruz said Ortiz then attacked Quick without provocation in the hallway.

“He saw him coming into my house, and he was coming to help us and save us. He stabbed him right there in front of my door, and we weren’t there to help him and save him,” said Cruz.

Responding officers arrested Ortiz without incident. He is now facing several criminal charges for allegedly attacking Guzman and Quick, including murder, attempted murder and criminal possession of a weapon.

One of the city’s social services providers has an office in the building lobby. But the door was locked during PIX11 News’ visit to the building Monday evening, and no one could say whether Ortiz was a client receiving any services.