Another person has died under the supervision of United States immigrant officers — and she had only been there five days.

The US Border Patrol arrested 36-year-old Raquel Calderon de Hildago, an immigrant from Guatemala, on November 17. She had no criminal history, but Border Patrol transferred her to the Eloy Detention Center, a private prison in Arizona, on November 23. 

US Immigration and Customs Enforcement (ICE) planned to deport Calderon de Hildago, but sadly, she never made it back to Guatemala. 

The cause of death hasn't been released, but ICE claims Calderon de Hildago had a series of seizures.

She later died at an area hospital.

Worst of all, she isn't the first immigrant to die at Eloy.

The Associated Press reports that 15 people have died at the detention center since 2004.

Jose de Jesus Deniz-Sahagun, a 31-year-old Mexican immigrant, committed suicide at the facility in May 2015.

Another person died on the same day as Calderon de Hildago. Wenceslau Esmerio Campos, 49, a Brazilian immigrant died of a cardiac arrest after complaining of chest pains, according to ICE.

Both of their deaths reveal a bigger issue: Immigrants are dying in droves in detention facilities. Immigration Impact found that 165 immigrants have died in custody since 2003.

On July 7, Human Rights Watch released an extensive review of deaths at US immigration detention centers by two independent medical experts. They reviewed the deaths that occurred between 2012 to mid-2015 and found "substandard medical care and violations of applicable detention standards."

In August, the public got a glimpse of what these ICE facilities actually look like after two detainees filed a class action lawsuit against the Arizona Border Patrol Detention Facilities.

The detainees alleged mistreatment, abuse, and neglect by detention officers.

The detainees claimed the border patrol limited and/or denied them access to beds, soap, showers, adequate meals and water, and medical care. They also claim they were denied legal counsel, which is a violation of the Constitution and the border patrol's own policies

Related from Vivala: These are the inhumane photos the border patrol doesn't want you to see

In January, Juanes and John Legend traveled to the detention center to protest.

"None of those detained are because they committed some crime. Their only infraction is that they were here without papers," Legend told The Associated Press. "That is why they are here now and they don't have the money to post bail."

Sadly, Calderon de Hildago has now been added to a long list of dead detainees. 

ICE officials are investigating Calderon de Hildago's death, according to Yasmeen Pitts O'Keefe, the agency's public affairs officer. 

"The appropriate state health and local law enforcement agencies have been advised of the death, as have the Department of Homeland Security’s Office of Inspector General and ICE’s Office of Professional Responsibility," O'Keefe told Vivala.

This is a developing story. Vivala will issue updates as more details become available.