Tractor-trailer found outside Wal-Mart had nearly 40 people inside; authorities don’t know where the truck began its journey The death toll from an apparent human smuggling crime has risen to 10 after eight people were found dead in San Antonio overnight inside a sweltering tractor trailer packed with men, women and children, authorities said. Two later died in the hospital. Twenty people who also were in the trailer were taken to area hospitals, some by helicopter, in very serious or extremely critical condition, San Antonio Fire Chief Charles Hood said at an early morning news conference. Another eight individuals were treated for less serious dehydration, he said. Paramedics reported that people had high heart rates and were hot to the touch, suffering from heat stroke and dehydration, he…