The modelling work inspired him to get a haircut, and, at the hair salon, a glamorous woman with a sprightly, cheerful presence, whom I’ll call Emma, trimmed his hair. Marco tends to credit his appearance for the pivotal events of his life: he believes his looks were the reason that Henkel chose him—many of Henkel’s sons had dark hair and eyes—and, twenty years later, the explanation for his first serious relationship. “I was pretty, and she didn’t leave,” he told me, of Emma. He added, only partly joking, “Some women are just really into asshole types, and I was one of those asshole types.”

At first, he was resistant to a relationship, but gradually he found Emma’s devotion persuasive. More than once, she slept outside his apartment door. “I noticed that she really loves me, and that in life there’s probably only one person who comes along who will really fight for you,” he said. He tried to blunt his antisocial impulses by remembering that they were not innate but had been conditioned by his upbringing. “I reprogrammed myself, so to speak,” he said. “I tried to re-raise myself.”

When I visited Marco, in May, he and Emma had just moved from Berlin to a new development on the city’s outskirts that he asked me not to name or describe, because he didn’t want his neighbors to know about his past. He now has two children, and they were playing with Emma in their large back yard. Inside, Marco listened to meditative lounge music and drank water from the largest coffee mug I’ve ever seen. I had the sense that with a different childhood Marco might have aged into a fairly jolly middle-aged man. He was playful and earnest and spoke poetically about his view of the afterlife. He shared his children’s developmental milestones with nuance and pride. In a gust of hospitality, he asked if I wanted Emma to cut my hair, before apologizing profusely and saying that my hair looked just fine.

A few days before my visit, the Berlin Senate had announced that it would commission scholars at the University of Hildesheim, who had published the preliminary report in 2020, to do a follow-up report about pedophile-run foster homes in other parts of Germany. Sandra Scheeres, the senator for education, had apologized to Marco and Sven, and the Senate offered them more than fifty thousand euros—in Germany, where compensation for damages is much lower than it is in the United States, this was seen as a significant amount.

Christoph Schweer, the AfD adviser, had urged Marco and Sven to keep fighting, but Marco couldn’t understand why. “We have gotten our wishes, so there’s no point in further irritating or tyrannizing the Senate,” he told me. But Schweer kept pushing him, Marco said. (Schweer denies this.) “Then I slowly got suspicious. I asked myself, What else should I want? That’s when I got the feeling that the AfD just wants to use me, to play me up. And I said, ‘I don’t want to be a political tool. I don’t want to get pulled into an election campaign.’ ” He dropped his lawsuit and accepted the Senate’s offer. His only remaining goal is that, in the upcoming report, all the names of people involved in carrying out Kentler’s experiment be revealed. (Schweer said that he had been supporting Marco as a “private person,” not on behalf of the AfD. He also told me, “I have new ideas, but for [Marco] it’s over.”)

Marco and Emma were getting married at the end of the month, and he didn’t want to think about his past. “I just wanted to end the whole thing, to have this chapter closed,” he said. He planned to take Emma’s last name. He hadn’t spoken with his birth parents or his brother since he was ten, and now he would become nearly untraceable. He had tried to Google his brother once, but he considered the idea of a reunion to be a waste of emotional resources that he could devote to his children. “It wouldn’t bring me anything, anyway,” he said. “The period of being shaped by my mother is over.”

At the end of my visit, Marco’s wedding ring arrived in the mail. Emma shrieked with joy, but Marco held the ring in his hand dispassionately and joked that he had to marry eventually, so he might as well do it now. He disguised his obvious tenderness toward her with a show of indifference that Emma apparently knew not to take seriously. “These are just the deficits that I have,” he said, referring to the lack of emotion. “I’ll get through it. It doesn’t matter.”

Three weeks later, on the eve of his wedding, he e-mailed me. “In an hour around 10 a.m. we will drive to the registry office,” he wrote. “Symbolically, a new life begins.”

After leaving Henkel’s home, Marco had contact with him only two times. The first time, when Marco was in his mid-twenties, Henkel suddenly called. He appeared to have developed some sort of dementia. He asked if Marco had remembered to feed their rabbits.

The next time was in 2015, when Emma was pregnant with their first child. Marco drove to a clinic in Brandenburg where he’d heard that Henkel was in hospice, dying of cancer. Marco opened the door to Henkel’s room. He saw Henkel lying in bed, groaning in pain. He had a long, wizard-like beard and looked to Marco as if he were possessed. Marco gazed at him for less than five seconds, long enough to confirm that he was actually dying. Then he turned around, closed the door, and walked out of the hospital.

After Marco got home, the radio in his kitchen was playing, but he didn’t remember having turned it on. A singer repeated the phrase “I’m sorry.” He felt as if Henkel were trying to get in touch with him. “I became a little bit crazy,” he told me. “I thought Henkel was a ghost who was following me, haunting me. It was definitely him: he was trying to apologize.”

Henkel died the next day. Marco entered a state of grief so fluid and expansive that, for the first time, he cried over the death of his foster brother Marcel Kramer. He had lain in bed with Kramer for an hour after he died, holding a kind of vigil; then he cut off one of Kramer’s curls, so that he’d have something to remember him by. But he had never properly mourned him. Suddenly, “the blockage disappeared,” he said. He realized why he hadn’t left Henkel’s home when he turned eighteen. “I was bound to the family by Marcel Kramer,” he said. “I would have never left him behind.”

A few weeks after Henkel’s death, the sense of being haunted began to recede. “The freedom came slowly,” Marco told me. “It was like a hunger that grows stronger and stronger. I don’t know how to say it, but it was the first time that I figured out that I am living a life with a billion different possibilities. I could have been anything. My inner voice became stronger, my intuition that I don’t have to live my life the way he taught me, that I can keep going.”