Idaho suspect was tracked as he drove across the country

Authorities carefully tracked the man charged in the killings of four Idaho college students as he drove across the country around Christmas and continued surveilling him for several days before finally arresting him Friday, sources tell CNN.

​Authorities carefully tracked the man charged in the killings of four Idaho college students as he drove across the country around Christmas and continued surveilling him for several days before finally arresting him Friday, sources tell CNN.