A prison escape, a fake uniform, and 2,000 caves: Inside the hunt for Grant Hardin

The intense search for escaped killer and ex-cop Grant Hardin continues into its fourth day in the Ozark Mountains. Law enforcement faces challenges due to the rugged terrain and Hardin's familiarity with the area's numerous caves. His past as a police officer and knowledge of the Ozarks are complicating the pursuit, as authorities urge residents to remain vigilant.