The Rock Rapids native has been labeled a person of interest in Sudiksha's disappearance but has not been charged or officially named a suspect.

Who is Joshua Riibe? The 22-year-old Iowa man is reportedly the last person to see Sudiksha Konanki in Punta Cana. Police have confiscated his passport.

As the search for University of Pittsburgh student Sudiksha Konanki continues, key witness Joshua Riibe was spotted on the beach assisting officials in the investigation.

Joshua Riibe was the last person seen with University of Pittsburgh student Sudiksha Konanki before she went missing while in the Dominican Republic. His attorney said his passport has been confiscated by Dominican authorities and he is confined to a hotel.

The last person authorities believe may have seen Sudiksha Konanki, the 20-year-old University of Pittsburgh student who vanished while on a spring break trip in the Dominican Republic, was back on the beach — this time with investigators.

An American linked to the disappearance of a University of Pittsburgh student was spotted by NBC News with investigators and his attorney on a beach in Punta Cana early Sunday. Joshua Riibe was seen pointing toward the sea while a group of security officials kept people away from the area.