The U.S. State Department confirmed that the two visited the U.S. Embassy in Athens on October 1, but there are different stories about what took place during that visit.
Father Kappes said he left only after he was denied help. He added that he made it clear he was looking for safe haven.
"In many different words and many different ways," Kappes said. "Even asking just to spend the night there, even by myself."
Virgil Kappes was the family member on the other end of the call from the embassy. He shared his son's frustration with that visit, also insisting that Kappes asked for help.
Virgil Kappes said his son left after it was clear no one would help.
"He said, 'Now, I have to leave this building. I want you to know that I love you. If you don't hear from me again, I will be dead,'" Virgil Kappes said.
The search for Christiaan Kappes began shortly after that phone call. Kappes and Lekakou were scheduled to fly into the United States a day after their trip to the embassy.
They never boarded their planes.
Father Kappes told Fox59 that he and Lekakou never took the flight because they felt they were in too much danger to wait in Greece.
"If you want to know what I was feeling at that moment, I was feeling we're gone, we're done, we're dead," Kappes said. "We don't know who these people are. I believe they have the worst intent for us.
“If it's motivated by money and I'm the only witness, then, you know, I'm a liability to have around."
Desperate to get out of the country, Kappes bought the first plane tickets out of the country. The two took a flight to Munich, Germay.
While flying into Germany, Kappes said he requested medical help for Lekakou and political asylum. He said police helped them from the airport to a Munich hospital. According to his bills, a day later, they were transported by ambulance to a psychiatry and psychotherapy facility in the community of Taufkirchen.
"That was a confusing time for us," Kappes said. "Not in the sense that we were fearful for our life every day, but that, I didn't know how long I was going to be there, I didn't have any explanation of if my family was or was not going to be contacted."
Kappes, who still has clothing issued by the hospital, said they were interviewed several times about why they fled Greece. He said he is unsure whether staff believed their story.
Reporter: "Do you believe there's a chance that you were actually just paranoid and that the real danger didn't exist in the same way?"
"I made decisions that could have been exaggerated, and I understood at the time that they could have been exaggerated but it was because I thought we were in danger and I didn't want to take any risks,” he said.
“If I'm going to take a risk on one side or the other to assume that this is a perfectly safe situation or it's not? In Greece, I'm going to assume it's not."