Joshua Riibe, the last person seen with missing University of Pittsburgh student Sudiksha Konanki, had his passport confiscated by Dominican Republic authorities as part of an ongoing investigation into her disappearance.

Joshua Riibe was not originally part of Sudiksha Konanki's travel group but met her on the night of her disappearance

The “person of interest” in the disappearance of missing Pitt student Sudiksha Konanki claims he saved them both from drowning before she vanished.

Even as an investigation into the case is underway, police in the Caribbean country have been interrogating one person -- Joshua Steven Riibe -- over the past several days. Here's what we know about him so far.

A man who might've been the last person to see a missing University of Pittsburgh student in the Dominican Republic said he rescued her from drowning — only for her to vanish a short time later, according to a transcript of an interview he gave local authorities.

The man who last saw missing University of Pittsburgh student Sudiksha Konanki told investigators he thought she was OK and had "taken her things and left."