Man who last saw missing Pittsburgh student Sudiksha Konanki thought she took ‘her things and left’

The man who last saw missing University of Pittsburgh student Sudiksha Konanki told investigators he tried to save her from the ocean, and that he thought she was OK and had “taken her things and left.”

Authorities believe Konanki, a 20-year-old who went missing while on spring break in Punta Cana, died by drowning, officials told ABC News.

On March 5, Konanki was part of a group that went to a nightclub and then for a walk on the beach, three Dominican officials involved in the investigation told ABC News. Most of the group went back to the hotel around 5:55 a.m. One man — 22-year-old Joshua Riibe, a college senior in Minnesota — stayed with Konanki on the beach, and the two went for a swim, according to a Dominican Republic investigative police report.

Riibe, who met Konanki that night, confirmed he and and the 20-year-old kissed after a night of drinking, he told a prosecutor Thursday, according to a transcript provided to ABC News from two Dominican Republic sources.

“A big wave came and hit us both, then the tide pulled us into the ocean,” he told the prosecutor. “When we surfaced, we tried to plead for help, but there was no one there.”

Riibe, a pool lifeguard, said he “held her under my arm and swam to get her out of the water.”

“I was trying to make sure that she could breathe the entire time — that prevented me from breathing the entire time and I took in a lot of water,” he explained.

“When I finally touched the sand, I put her in front of me. Then she got up to go get her stuff since the ocean had moved us,” Riibe told the prosecutor. “She was not out of the water since it was up to her knee. She was walking at an angle in the water.”

“The last time I saw her, I asked her if she was OK. I didn’t hear her response because I began to vomit with all the water I had swallowed,” he said. “After vomiting, I looked around and I didn’t see anyone. I thought she had taken her things and left.”

“After I saw her walking away, while she was walking in the water, I never saw her again,” he said.

Riibe said he passed out on a beach chair and woke up to the sun and mosquitoes on him. He was seen on surveillance footage returning to his room several hours later.

Authorities said Riibe is not a suspect and is cooperating. But the prosecutor’s office said it is “conducting multiple investigating steps that extend beyond a possible accidental event.”

Riibe is “deeply dismayed by her disappearance and has fully cooperated in the search,” his parents, Albert and Tina Riibe, said in a statement Friday.

“His faith and values have guided his path, and those who know him can attest to his integrity and good heart,” they said.

“Despite his full willingness to cooperate, Josh has been detained under irregular conditions and subjected to extensive questioning without the presence of official translators or legal counsel until Wednesday,” his parents alleged. “We recognize that this is a complex and painful situation for all parties involved, and we trust that the investigation will be conducted with transparency and justice. Our only interest is that due process be respected and that actions be taken with the fairness that the situation requires.”

“We express our deep sorrow and solidarity with the family of Sudiksha Konanski during this painful time,” the parents said. “Above all, we wish to contribute to the search efforts and understand the anguish and uncertainty they are going through and we share the hope that Sudiksha will be found as soon as possible.”

ABC News’ Caroline Guthrie contributed to this report.