Joshua Riibe, the person of interest in the disappearance of Pitt student Sudiksha Konanki, had his passport seized by authorities in the Dominican Republic.

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.

The last person to see University of Pittsburgh student Sudiksha Konanki before she vanished had his passport seized by authorities in the Dominican Republic, according to a new report. Officials on the Caribbean island confiscated Joshua Riibe’s travel documents nearly 10 days after Konanki was last seen with the 22-year-old Minnesota college senior on the beach near their RIU Hotel & Resort on March 6.