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.

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, the person of interest in Sudiksha Konanki's March 6 disappearance in the Dominican Republic, has spoken out for the first time, stating that he is 'just trying to help.'

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

Joshua Riibe, a 24-year-old tourist from Iowa, has come under the spotlight, with investigators naming him a 'person of interest.'

A person of interest has been named in the ongoing investigation into the disappearance of 20-year-old Sudiksha Konanki, a pre-med student at the University of Pittsburgh who went missing while vacationing with friends in the Dominican Republic.

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