Police in Laredo say they found 36 immigrants inside a dump truck that had been towed to an impound lot. The immigrants, all thought to be in the U.S. illegally, were found Thursday hidden inside a compartment hidden by sand, dirt and gravel. The truck was towed to a remote lot in the border city after the truck had a flat tire and was considered a traffic hazard. The driver was arrested after police discovered he had a warrant connected to a homicide case. Police searched the truck and found the immigrants after receiving an anonymous tip.