The man who last saw missing University of Pittsburgh student Sudiksha Konanki told investigators he tried to save her from the ocean, and that he thought she was OK and had "taken her things and left." Authorities believe Konanki, a 20-year-old who went missing while on spring break in Punta Cana, died by drowning, officials told ABC News. On March 5, Konanki was part of a group that went to a nightclub and then for a walk on the beach, three Dominican officials involved in the investigation told ABC News.