Overview
- Luis Marquez was taken into custody Monday, returned to the 26th Precinct after a psychiatric hold, and charged Tuesday with murder.
- Investigators say surveillance shows a suspect waiting in a third-floor stairwell before attacking as Carmen Yadira Lopez exited an elevator around 4:25 a.m., with audio of her pleading, “Luis, stop.”
- Lopez suffered nearly 50 stab wounds, was discovered by the building porter in the hallway, and was later pronounced dead at Mount Sinai Morningside.
- Police and sources describe an on‑again, off‑again relationship and cite jealousy as a possible motive under investigation.
- Family and neighbors say Lopez was a devoted mother of four with two children still at home, and her arraignment in Manhattan Criminal Court is pending.