Her family confirmed authorities identified Stephaniak through fingerprint data. The Judicial Investigation Department said Bismarck Espinosa Martinez, who worked as a security guard on the property, was taken into custody, according to NBC News.
Blood was found inside the apartment.
Friend Bugra Demirel of Tallahassee said in a telephone interview that the 36-year-old insurance agent, loved to travel and post photos on Instagram. He said Carla was a "happy soul" who made everyone laugh and had a large social media presence.
A body found in Costa Rica has been identified as a Florida woman who went missing while she was on vacation, according to her family.
Anyone with information in the case is asked to contact the Judiciary Investigative Police in Costa Rica at 800-800-0645 or through WhatsApp at 8800-0645.
Airbnb removed Villa le Mas - a compound with seven vacation apartments - from its site and said Wednesday that it had reached out to family members to offer condolences.
Costa Rica's Judicial Investigation Agency (OIJ) said an autopsy performed on her body showed that she had stab wounds around the neck and extremities and blunt-force trauma to the head. Her last post, tagged from Quepos, Costa Rica, on November 25, showed her sprawled next to an aquamarine-colored infinity pool. On Nov. 23, she posted a photo of her looking at the ocean that said, "Future resident of Costa Rica". It featured her in a turquoise bathing suit, lying near a pool with tropical plants in the background. She went missing on the day of her flight-just one day after her sister-in-law left the country. But Burton had needed to leave a day early, and Stefaniak had spent her last night in Costa Rica alone.
Stefaniak chose to travel to Costa Rica because it's been portrayed as a paradise where nothing bad happens, according to her best friend.
A posting on the "Finding Carla " Facebook page says Costa Rican authorities let the family view her body.
Stefaniak dropped their rental auto off at the airport and took an Uber for a tour around San Jose before checking into the Airbnb.
She also said the power had gone out and she was thirsty. She added that it was "pretty sketchy here" and included a picture of the Airbnb.
On Monday, search dogs found a partially buried female body covered with plastic bags in a wooded area near the Airbnb villa where she was staying. "Words can not express the devastation within her family and friends".
A lawyer for the complex where the Airbnb was located said witnesses saw Stefaniak get into a mystery vehicle at 5am on the Wednesday morning but family were quick to dismiss the witness account, saying the 36-year-old's flight was not till 1pm and she would not have left at that hour for the airport, located only half an hour away. "While most crimes are nonviolent, some criminals have shown a greater tendency in recent years to use violence", the US Embassy said. The family wondered why she would have taken a auto to the airport at 5 a.m. when her flight was in the afternoon.