
HARLEM, Manhattan (WABC) -- A man has been charged with murder in connection to the deadly stabbing of a woman inside an Upper Manhattan apartment.
Luis Marquez, 41, was charged with murder on Tuesday, hours after police identified the victim as 47-year-old Carmen Lopez.
He ignored questions as NYPD detectives took him from the 26th Precinct to his arraignment downtown.
Investigators believe Marquez is the ex-boyfriend of Lopez, who was attacked around 4:30 a.m. Monday inside her apartment building on West 129th Street in Manhattan.
Police say the suspect was caught on surveillance camera waiting for Lopez in the third-floor hallway of her building.
When she arrived, the suspect stabbed her multiple times all over her body.
She was rushed to Mount Sinai Morningside in critical condition, where she was pronounced dead.
Lopez's loved ones never imagined anyone wanting to harm her.
Devastated and determined friends struggled against the cold wind to pay tribute outside the building on 129th Street to the 47-year-old mother of four they knew as "Yadi."

She was a good friend, a good mother and so much more, according to several women who brought flowers and notes saying just how much they missed her smile and her big heart.
While her family asked for privacy, friends shared hugs and tears, and said Lopez hadn't told them anything about Marquez that would lead them to believe she was in danger.
Sources told Eyewitness News that a tip led them to Marquez, who had shown up at Lincoln Hospital with injuries from the vicious attack.
He was given a mental health evaluation before he was arrested at the hospital.
He has no criminal history, and is now waiting to appear for the first time before a judge to face a murder charge.
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