THEY WERE YOUNG. THEY WERE SMART -- OFTEN TO THE POINT OF ARROGANCE. BUT WERE THEY KILLERS? Investigative correspondent Peter Van Sant draws on penetrating interviews and extensive research to unravel a controversial case from TV's 48 Hours Mystery -- the two gifted college students charged with murdering one of their families in cold blood. Bellevue, Washington: Early on a serene summer evening, neighbors heard a muffled commotion from inside the...