Even as an investigation into the case is underway, police in the Caribbean country have been interrogating one person -- ...

Konanki was last seen around 4:15 a.m. on March 6, walking near the beach with Riibe, as shown in surveillance footage.

Sudiksha Konanki had arrived in the Caribbean for spring break and was last seen on the morning of March 6 with Joshua Riibe.

On March 13, Loudoun County Sheriff's Office named Riibe as a 'person of interest' in the case. Authorities said Riibe is not considered a suspect but 'he may have been the last one to see her'. The ...