He hasn't been charged or arrested per se, but he quite regularly talks about other forms of intimidation he undergoes. Laptops confiscated, apartment broken into, phone calls, border detainments.

Also, there were two other reporters who filed that story, and it is showing up in a reputable journalistic source - Der Spiegel. I am inclined to believe it, given the very specific details they have highlighted about TAO and ANT.