A prominent computer scientist, Xiaofeng Wang, has gone incommunicado and had his homes raided by the FBI.
Wang, who worked as an associate dean and tenured professor at Indiana University, had his professor profile, email account, and phone number removed by the university.
The reason behind the FBI raids and Wang's sudden disappearance is unknown.
Wang has been known for his work in cryptography, privacy, and cybersecurity, and has published numerous academic papers on these subjects.