() A second detainee shot in an attack on a U.S. Immigration and Customs Enforcement field office in Dallas has died, according to his family.

In a statement from the League of United Latin American Citizens, obtained by the Associated Press on Tuesday, the family confirmed that Miguel Ángel García-Hernández, 32, succumbed to his injuries after being removed from life support.

He was one of three detainees who were shot in a transport van, which was in the facility’s sallyport, where the van was located, on Sept. 24. The attack left one detainee, identified by ICE as 37-year-old Norlan Guzman-Fuentes, dead and two others critically injured.

DHS officials said in a statement that a sniper, identified as 29-year-old Joshua Jahn from Collin County, Texas, fired “indiscriminately” at the ICE field office from a nearby rooftop. He died by suicide, according to Homeland Security Secretary Kristi Noem. No law enforcement personnel were injured.

The attack happened as heightened immigration enforcement has generated a backlash against ICE agents and stirred fear in immigrant communities across the country.

“My husband Miguel was a good man, a loving father, and the provider for our family,” said Stephany Gauffeny, who is expecting their fifth child. “We had just bought our first home together, and he worked hard every single day to make sure our children had what they needed. His death is a senseless tragedy that has left our family shattered. I do not know how to explain to our children that their father is gone.”

A man threatened ICE officers and claimed to have a bomb at the same field office on Aug. 26, according to DHS. The suspect, a 36-year-old American citizen, was arrested and charged with making terroristic threats.

In recent months, federal lawmakers and activists have alleged “inhumane” treatment of detainees at the field office, including the withholding of food, water, air conditioning or proper sleeping quarters.

’s Ali Bradley, Anna Kutz and Jeff Arnold contributed to this report.