The man who allegedly stalked and then stabbed his on-and-off again girlfriend to death inside her Upper Manhattan apartment earlier this month was indicted on a murder charge Tuesday.

Court statements revealed during a Tuesday hearing at New York Criminal Court showed just how premeditated the attack was, according to prosecutors. They charged that Lopez’s ex-boyfriend Luis Marquez, 41, of the Bronx, allegedly stalked Lopez while she was at a club with her friends.

After briefly speaking with her, he then made his way to her apartment building at 409 West 129th St. Prosecutors said he lay in wait within the stairwell for more than two hours for her to return home. When she arrived, he allegedly went on the deadly attack.

Marquez allegedly pinned her to the ground and stabbed her in her

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