Authorities say the man isn't a suspect but he may have been the last to see the University of Pittsburgh student.

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.

Dominican Attorney General Yeni Berenice Reynoso grilled U.S. witness Joshua Riibe in person in the unsolved disappearance of Sudiksha Konanki, of Virginia.

The search for the missing University of Pittsburgh student, who was on spring break in Punta Cana, is entering its second week.