Joshua Riibe, a 22-year-old from Iowa, is believed to be the last person to see Sudiksha Konanki alive on March 6.

A man who investigators believe was the last person to see missing US college student Sudiksha Konanki alive appeared in a Dominican Republic court Tuesday to ask it to grant him freedom, arguing Dominican authorities have inappropriately restricted his movements without charges since the 20-year-old woman’s disappearance.

The parents of Sudiksha Konanki requested that authorities in the Dominican Republic officially declare their daughter dead about two weeks after the University of Pittsburgh student went missing in Punta Cana.