Espinoza shared no details on what police uncovered, other than to say they have reviewed surveillance footage and interviewed anyone they could find who had contact with Stefaniak.
American Carla Stefaniak went missing in Costa Rica.
A Gofundme account said she was last heard from around 8pm on November 27 and she didn't show up for her 1pm flight home the next day. Stefaniak never made it to her Wednesday afternoon flight. Her body, covered in plastic bags, was discovered Monday about 300 yards from the Airbnb where she stayed.
In an interview, family friend Greg Zwolinsky talked about the main concerns and questions that the family had about Stefaniak's disappearance.
"It was her birthday, and she loves to be on social media", Stefaniak's brother, Carlos Caicedo, told CBS News.
Friends and family grew anxious when Stefaniak didn't answer messages wishing her a happy birthday on Wednesday, CBS News reported.
Stefaniak reportedly FaceTimed a friend around 7:30 p.m. Jaime gave this account of the missing woman's last hours: Stefaniak made a phone call the night of November 27.
Though it's unclear whether it was Martinez who said this, BBC reports that security guards initially claimed to have seen Stefaniak take an Uber to go to the airport on the morning she was supposed to fly home. To BBC, he said, "It's a frightful wait, and every single minute that Costa Rican officials are not showing the body is just a tremendous amount of pain on the family".
Bugra Demirel told the BBC: "It's a terrible wait, and every single minute that Costa Rican officials are not showing the body is just a tremendous amount of pain on the family".
Authorities are waiting for autopsy results, which could be released Tuesday. We're going on six days not hearing from her.
"Solving this case is very important for the country, very important for the family of the victim", explained Walter Espinoza, spokesperson for Costa Rica's judicial investigation department, "and it is very important for this society in general". "We checked her email and she did not take an Uber at 5.10am".