A person of interest in the case of a missing University of Pittsburgh student broke his silence over the weekend, saying that he is focused on helping authorities in the Dominican Republic locate 20-year-old Sudiksha Konanki.

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

The top prosecutor in the Dominican Republic personally questioned Joshua Riibe Saturday, the last known person seen with missing Virginia college student Sudiksha Konanki, as authorities intensify their investigation into her disappearance.

Authorities believe Konanki, a 20-year-old who went missing while on spring break in Punta Cana, died by drowning, officials told ABC News.

Riibe, linked to the disappearance of Sudiksha Konanki in Punta Cana, remains under investigation. Dominican authorities confiscated the passport of Joshua Riibe, a 22-year-old American linked to the disappearance of Sudiksha Konanki,

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.

Authorities in the Dominican Republic have seized the passport of Joshua Riibe, the man seen with University of Pittsburgh student Sudiksha Konanki before she went missing, Fox News has learned.

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.

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