Officials have explained the mysterious closure of a New Mexico observatory earlier this month, saying they were investigating one of the facility's janitors for possession and distribution of child pornography.
The Sunspot Solar Observatory at Sacramento Peak was shut for 11 days for "a security issue," and its closure drew cheeky speculation that authorities were investigating the presence of UFOs.
According to unsealed federal court documents, the FBI was examining the observatory – but not for the presence of aliens. In an affidavit, an FBI agent wrote that she was looking at the "activities of an individual who was utilizing the wireless internet service of the National Solar Observatory in Sunspot, New Mexico, to download and distribute child pornography."
The FBI says it closed the observatory in case the suspect posed a danger to other employees. The observatory reopened on Monday.
NPR's Laurel Wamsley reported that the Association of Universities for Research in Astronomy said the decision to evacuate the facility was based on "the need for expeditious response to the potential threat."
"Our desire to provide additional information had to be balanced against the risk that, if spread at the time, the news would alert the suspect and impede the law enforcement investigation. That was a risk we could not take," AURA said in a statement.
Sheriff Benny House told the Alamogordo Daily News when the observatory closed, "For the FBI to get involved that quick and be so secretive about it, there was a lot of stuff going on up there. There was a Blackhawk helicopter, a bunch of people around antennas and work crews on towers but nobody would tell us anything."
The observatory is about 85 miles southwest of Roswell, N.M., where flying objects were spotted in 1947, sparking theories they could have been aliens or UFOs. The U.S. Air Force said the objects were high-altitude weather balloons.
The closure of the observatory inspired social media speculation. Wamsley reported on posts on the observatory's Google page. "Why the FBI close the observatory?? People have the right to know!!" one person wrote.
Authorities have not arrested or charged the suspect they were investigating, and no arrest warrant has been issued.
A U.S. magistrate in Las Cruces, N.M., did issue a warrant showing that on Sept. 14 agents removed cell phones, laptops, an iPad, a hard drive and several thumb drives from the suspect's home.
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