Authorities vow relentless search as manhunt for interstate shooter enters third day in Kentucky [Video]

As a grueling manhunt stretched into a third day Monday for a suspect in an interstate shooting that struck 12 vehicles and wounded five people, authorities vowed to keep up a relentless search as the stress level remained high for a rural area where some schools canceled classes.Authorities have been searching a rugged, hilly area of southeastern Kentucky since Saturday evening, when a gunman began shooting at drivers on Interstate 75 near London, a small city of about 8,000 people located about 75 miles south of Lexington.The search was temporarily suspended once darkness fell Sunday night, but was set to resume Monday morning.“We’re not going to quit until we do lay hands on him,” Laurel County Sheriff John Root said Sunday night.Joseph A. Couch, 32, was named first as a person of interest and later as a suspect in the shooting after authorities said they recovered his SUV on a …