Texas authorities charged a US Border Patrol supervisor with murder following what they called a two-week serial killing spree that left four female sex workers dead and ended when a fifth woman escaped at a gas station. Juan David Ortiz, 35, an intel supervisor for the Border Patrol, was charged with four counts of murder as well as aggravated assault and unlawful restraint, Webb County District Attorney Isidro Alaniz said. Ortiz was arrested after the fifth woman managed to flee. State troopers found Ortiz hiding in a truck in a hotel parking lot in Laredo at around 2am Saturday. "We do consider this to be a serial killer," Alaniz said. Alaniz said that after the suspect picked up the fifth woman she quickly realized that she was in danger. "When she tried to escape from him at a gas station that's when she ran into a (state) trooper," Alaniz said.