Susan Olsen doesn’t have 55 years to learn what happened to her 26-year-old missing son, who police believe likely was murdered six years ago.

Olsen followed the prosecution of Jack McCullough, the 73-year-old man convicted last year of kidnapping and murdering 7-year-old Maria Ridulph in December 1957. She watched the “48 Hours” special, “Cold as Ice,” about McCullough because she knew Ridulph’s older brother, Charles.

Like Charles Ridulph, she knows what it is like to wonder for years what happened after a family member vanished. Maria Ridulph disappeared one evening after a man approached her and a friend playing near their homes. Bradley Olsen, 26, disappeared after looking for a ride home to Maple Park at a bar on West Lincoln Highway in DeKalb in January 2007.