A man believed to be the last person to see missing University of Pittsburgh student Sudiksha Konanki is asking a court to grant him his freedom, challenging authorities’ treatment of him since the 20-year-old woman’s disappearance nearly two weeks ago.

The search for a U.S. college student who went missing in the Dominican Republic intensified on Monday after a man questioned by authorities visited the beach where she was last seen and spoke with officials.

Joshua Riibe, believed to be the last person to see Sudiksha Konanki before she vanished in Punta Cana, said he's trying to 'help' investigators as he warned 'the ocean is a dangerous place'