SAN ANTONIO — Two smugglers charged after 53 immigrants died in the back of a sweltering tractor-trailer with no air conditioning were found guilty Tuesday after a two-week trial. The 2022 tragedy in San Antonio was the nation’s deadliest smuggling attempt across the U.S.-Mexico border.

Jurors in federal court in San Antonio took only about an hour to convict Felipe Orduna-Torres and Armando Gonzales-Ortega, finding that they were part of a human smuggling conspiracy that resulted in death and injury. They face up to life in prison and have a June 27 sentencing date.

The immigrants had come from Guatemala, Honduras and Mexico and had paid between $12,000 and $15,000 each to be smuggled into the United States, according to an indictment in the case. They had made it as far as the Texas border city of Laredo when they were placed into a tractor-trailer with broken air conditioning for a three-hour drive to San Antonio.

As the temperature inside the trailer rose, those inside screamed and banged the walls of the trailer for help or tried to claw their way out, investigators said. Most eventually passed out. When the trailer was opened in San Antonio, 48 people were already dead. Another 16 were taken to hospitals, where five more died. The dead included six children and a pregnant woman.

“These defendants knew the air conditioning did not work. Nevertheless they disregarded the danger,” Acting U.S. Attorney Margaret Leachman for the Western District of Texas said in a news conference after the verdict Tuesday. Orduna-Torres was the leader of the smuggling group inside the U.S., and Gonzales-Ortega was his “right-hand man” she said.

Five men previously pleaded guilty to felony charges in the smuggling case, including the truck driver Homero Zamorano Jr., who was found hiding near the trailer in some bushes. He faces a maximum sentence of life in prison.

Also pleading guilty are Christian Martinez, Luis Alberto Rivera-Leal, Riley Covarrubias-Ponce and Juan Francisco D’Luna Bilbao. All five will be sentenced later this year. Another person charged in the U.S. remains a fugitive, Leachman said. Several others have been charged in Mexico and Guatemala.

The incident is the deadliest among tragedies that have claimed thousands of lives in recent decades as people attempt to cross the U.S. border from Mexico. Ten immigrants died in 2017 after they were trapped inside a truck parked at a Walmart in San Antonio. In 2003, the bodies of 19 immigrants were found in a sweltering truck southeast of San Antonio.