Search continues for retired UNC professor who went missing during swimming competition Posted Jun 15, 2019 The search continues Saturday for retired North Carolina professor Dr. Charles Van Der Horst, who reportedly went missing while he was competing in a swim in the Hudson River near the George Washington Bridge. Officials say at some point, fellow competitors in the "8 Bridges Hudson River Swim" noticed the 67-year-old swimmer went missing on Friday. (ABC 11)