articleThe Brief A man accused of killing his girlfriend in Columbia, Maryland was arrested in Texas. Police believe Esmeralda Perez-Mendez was killed inside a home in Columbia. A man who is accused of killing his girlfriend in Columbia, Maryland, over the weekend was arrested in Texas, law enforcement officials said Monday. Authorities say Darwin Carcamo‑Santiago, 24, killed Esmeralda Perez‑Mendez, 35, of Takoma Park, inside a residence in the 9000 block of Watchlight Court. He was taken into custody without incident by local authorities in Texas, according to police.