When federal agents kicked in his door one icy morning last November, Joerg Arnu was still asleep. Roused by deafening bangs and shouts, the 60-year-old retired software developer stumbled out of bed to find a crowd of unfamiliar men in military gear standing in his foyer.

At least one of the half dozen men, he remembers, was visibly armed and pointing a gun in his direction. Another was holding a riot shield. “This is the FBI,” one yelled. “Put your hands against the wall!” Less than a minute later, Arnu was being handcuffed and led forcefully outside, dressed only in sweatpants and a T-shirt. His house, located in the remote town of Rachel, Nevada, had been swarmed by police vans. Shivering from a lightly falling snow, he was placed in the back of one of the vehicles, while over a dozen agents from the FBI and the Air Force Office of Special Investigations—the Air Force’s secretive counterintelligence wing—poured into his home. Not long afterwards, agents started asking him questions. One of the first things they wanted to know was: “Are there any booby traps on the property?” To Arnu, it seemed like a pretty weird thing to ask. A retired software developer and self-admitted senior citizen? Did that really sound like somebody who would boobytrap his own house?

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Of course, Arnu had one particular hobby that he felt might be of interest to federal investigators: he had spent the last two decades tending to a popular blog about “Area 51,” the remote military base near Rachel that was known for its shroud of mystery and UFO lore. Arnu’s site, Dreamland Resort, regularly posted news about the base—including articles about its alleged connection to “black projects” and other clandestine government operations. When police crashed into his life that wintry day, he suspected it had something to do with this. Still, running a blog wasn’t illegal, and the force with which the government had come down on him seemed unbelievable. Just what exactly were agents looking for what? And what did they think he’d done?

Read more: Gizmodo