The man who is the last person known to have been with missing University of Pittsburgh student Sudiksha Konanki is on a plane heading back to the US after he obtained a new passport, a source in the prosecutor’s office told CNN Wednesday.

Joshua Riibe's return to the U.S. remains unclear as there was no immediate decision about returning his passport, which authorities confiscated last week.

There's still no word on the remains of missing University of Pittsburgh college student Sudiksha Konanki who vanished while on spring break in the Dominican Republic. Her parents now believe she drowned.