Four people have been charged in connection with the deaths of 53 migrants being smuggled inside a tractor trailer in southwest San Antonio.

45-year-old Homero Zamorano Jr, 28-year-old Christian Martinez, 23-year-old Juan Claudio D’Luna-Mendez, and 48-year-old Juan Francisco D’Luna-Bilbao all face criminal charges for their alleged involvement in the smuggling operation in violation of Title 8 of United States Code, Section 1324.

The charges are as follows:

  • Zamorano faces one count of alien smuggling resulting in death and if convicted, up to life in prison or possibly the death penalty
  • Martinez faces one count of conspiracy to transport illegal aliens resulting in death and if convicted up to life in prison or possibly the death penalty
  • D’Luna-Mendez and D’Luna Bilbao each face one count of possession of a weapon by an alien illegally in the U.S. in violation of Title 18, United States Code, Section 922(g)(5) and if convicted, both face up to 10 years in prison

According to court documents, Homeland Security responded to the scene involving a tractor trailer and 64 people suspected of entering the US illegally on Monday, June 27. San Antonio police officers told Homeland Security that they arrived at the scene after receiving 911 calls about the trailer.

Officers found multiple people, some still inside the trailer and some on the ground and in nearby brush, many of them dead and some incapacitated, court documents say.

Officers were then led to a person hiding in the brush after attempting to leave who was later identified as Zamorano and detained. Surveillance footage of the trailer crossing through an immigration checkpoint showed a driver matching Zamorano’s description and clothing, says the US Attorney’s office.

48 people at the scene were pronounced dead; 22 were Mexican nationals, seven from Guatemala, two from Honduras and 17 of unknown origin but suspected to be undocumented. Five more people died at the hospital. Officials are currently working with foreign consulates to notify next of kin, says the US Attorney’s Office.

Martinez was arrested in Palestine, Texas after a search warrant executed on a cell phone belonging to Zamorano revealed communications between the two about the smuggling, court documents say.

D’Luna-Mendez and D’Luna-Bilbao, both Mexican nationals, were arrested after the registration for the trailer led officers to a San Antonio home and two men, identified as D’Luna-Mendez and D’Luna-Bilbao, were seen leaving the home in separate trucks, court documents say.

After officers performed traffic stops on both trucks, D’Luna-Bilbao was found in possession of a handgun in the center console of the truck. A search warrant executed on the home revealed additional firearms, according to court documents.

Both D’Luna-Mendez and D’Luna-Bilbao were determined to be in the US illegally.

The US Attorney’s Office says all four men are in federal custody.