Norlan Guzman-Fuentes, 37, a detainee from El Salvador, was among three people shot at a Dallas immigration field office last week and the first person killed in the attack.

In the small town of Jiquilisco in south-central El Salvador his family mourns.

Guzman-Fuentes' sister, Alba Rubida Guzman, said he left El Salvador when he was 17-years-old and worked in the U.S. for two decades.

The 37-year-old had worked cutting trees and after his detention had resigned himself to leaving the U.S.

His wife had planned to meet him in El Salvador and then they both planned to move to Mexico where her father had a construction job waiting for him, Rubida told El Salvador’s Channel 12 Tuesday.

His mother María Apolonia Fuentes learned of his death when she returned from the store and found relatives at home crying.

He had recently wanted her to come to the U.S., but she got sick.

"What I want is justice, because he’s not an animal that they’ve killed,” she said.

Authorities have said the gunman in the Sept. 24 attack, Joshua Jahn, 29, fired indiscriminately from a nearby roof onto the U.S. Immigration and Customs Enforcement facility and a van holding detainees in a gated area.

No ICE personnel were hurt in the shooting, and Jahn fatally shot himself following the assault.

"He dedicated himself to work, his family, and whenever he could he helped us,” Rubida said.