Image Credit: MediaPunch via Getty Images Robert Carradine is being mourned by his friends, former co-stars and family in the wake of his untimely death. The late 71-year-old, who famously played the dad character, Sam McGuire, on the Disney Channel's Lizzie McGuire series, died by suicide, his older brother, Keith Carradine, announced. "It is with profound sadness that we must share that our beloved father, grandfather, uncle, and brother, Robert Carradine, has passed away," Keith's statement read, according to Deadline.