The top prosecutor in the Dominican Republic personally questioned Joshua Riibe Saturday, the last known person seen with missing Virginia college student Sudiksha Konanki, as authorities intensify their investigation into her disappearance.

Riibe was named as a "person of interest" in the case, though he has not been formally accused of any crime or charged.

Sudiksha Konanki was last seen entering the beach behind the resort on the morning of March 6, accompanied by her friends and Iowa tourist Joshua Riibe.

Joshua Riibe, a 24-year-old tourist from Iowa, has come under the spotlight, with investigators naming him a 'person of interest.'

Joshua Steven Riibe, 24, has been identified as the man seen hugging and walking hand-in-hand with the 20-year-old student just hours before she vanished in the Dominican Republic.

According to a source involved in the investigation, Riibe, a former high school wrestler with a strong build, has been "cooperative" with authorities.

The swimsuit cover-up and sandals Konanki was last spotted in were later seen on a lounge chair in the Dominican Republic

Spring breaker Sudiksha Konanki was last seen with Rock Rapids, Iowa native Joshua Riibe before her disappearance on March 6.

Newly-released images bear a striking resemblance to the clothing the missing woman was wearing the night she disappeared.