DALLAS (CBSDFW.COM) – Police are searching for a suspect who shot and killed a 59-year-old woman in front of her North Dallas apartment during a suspected robbery.

Eunice Nzuelu was returning to her apartment in the 9600 block of Forest Lane just before 10:30 p.m. Friday when the suspect approached her with a gun and “demanded property/money,” police said.

A witness inside his apartment overheard the confrontation and the gunshot that followed. Police said when the witness left his apartment he found Nzuelu in the parking lot unconscious.

First responders declared her dead at the scene. The suspect has not been caught, and a spokesman said authorities were interviewing witnesses Saturday afternoon.