On the evening of December 24, 2014, 27-year-old waitress Evelyn Yamalith Arroyo was arriving for a shift at El Sabor Latino Restaurant on 14th Street NW in Washington, D.C., when she was confronted by her ex-boyfriend, Marvin Lopez. Witnesses described a struggle; Lopez allegedly pushed Arroyo against a wall, produced a gun and shot her. Two Metropolitan Police Department lieutenants driving nearby heard the shots and responded. One officer chased Lopez but lost him in a wooded area, while the other found Arroyo on the sidewalk with a gunshot wound to her chest and a graze wound to her head. She was taken to a hospital and pronounced dead.

Witnesses who knew the couple told police they had seen Lopez with Arroyo just before the shooting and provided Facebook messages in which Lopez allegedly threatened to kill her. Detectives searching Lopez’s apartment the next day reportedly found photos of Arroyo torn to pieces. An arrest warrant was issued on December 25, but Lopez fled to El Salvador and remained at large for years before being brought back to face charges.

Arroyo was the mother of a three-year-old at the time and had been trying to distance herself from Lopez. What new information might help finally close the gaps in the timeline of Lopez’s departure that night?