Actor Jansen Panettiere, who is the younger brother of "Nashville" actress Hayden Panettiere, has died. He was only 28 years old. First responders were called to a NY residence Sunday evening about 5:30. No cause of death was immediately available.  Panettiere, had roles in the "Walking Dead", Disney’s "Even Stevens", "Blues Clues" and "Racing Stripes" and was currently working on 5 projects.