The last person to see missing Pittsburgh student Sudiksha Konanki claims he rescued her from difficult Caribbean waters before losing her - but refused to answer eight questions put forward to him by police. Minnesota college senior Joshua Riibe, 22, who has since been named as a person of interest in the missing persons case, recalled his final moments with Konanki, 20, before she disappeared in the dead of night. “I was a lifesaver. I grabbed her and pulled her out,” Riibe told the Public