Investigators searched for a Mexican drifter alleged to be a serial killer with a taste for riding the rails. Police in the United States and Mexico were looking for Rafael Resendez Ramirez, who has been linked to six deaths in Texas and one in Kentucky, all brutal beatings that took place near railroad tracks. "Right now he is the most wanted man in Texas," said Texas Department of Public Safety Director Dudley Thomas. "We certainly need to hear from anyone with information that could lead us to him." Resendez is thought to be crisscrossing Texas by hopping eastward-bound freight trains, then heading back toward the Mexican border in cars stolen from victims in his alleged murder spree.