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 has arrived in the U.S., his lawyers told PEOPLE Wednesday The American college student who was the last person to see Sudiksha Konanki alive is finally back home in the U.S. Joshua Riibe,

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.