"Some families just feel left without answers, they feel hopeless," he said.'Push for change'Mr Thornbury said that during the Nicola Bulley case, people had organised searches through the Facebook group.

Joshua Riibe, a senior at St. Cloud University in Minnesota who is believed to be the last person to see missing University of Pittsburgh student Sudiksha Konanki in the Dominican Republic, left the Caribbean country on Wednesday,

Joshua Riibe's departure ends what his attorneys allege was a dayslong detainment in the country as investigators questioned him in connection with Sudiksha Konanki's disappearance.

The last person to reportedly see missing college student Sudiksha Konanki, 20, alive is no longer a 'person of interest' and could 'return to the U.S. as early as today,' police confirmed to PEOPLE.

The parents of missing Pitt student Sudiksha Konanki wrote a letter to investigating authorities asking them to declare her legally deceased.