The man charged with driving a Texas tractor-trailer packed with immigrants in the U.S. illegally will remain in detention after an initial court appearance. According to the complaint, one of the passengers says people in the trailer were taking turns breathing through a hole inside. A federal criminal complaint says the driver of a broiling tractor-trailer found packed with immigrants outside a Walmart in San Antonio told investigators that he was unaware that there were people inside until he parked and got out to urinate. A federal complaint says immigrants packed into a tractor-trailer discovered outside a Texas Wal-Mart were taking turns breathing through a hole in the trailer and pounding on the walls to get the driver's attention. According to a complaint filed Monday, a passenger in the trailer told investigators that he and others who had crossed the U.S.-Mexico border illegally were guided into the trailer to be taken north to San Antonio. Federal prosecutors on Monday charged James Matthew Bradley with illegally transporting the immigrants for commercial or financial gain, resulting in the deaths of 10 people inside. Federal authorities in Texas have charged the driver of a tractor-trailer with transporting immigrants in the U.S.