"CIA front" is a weird thing to say. It's openly funded by the US Government, so it's not like Radio Free Europe's affiliation is a secret or a conspiracy; we don't need to exaggerate for effect here.
Anyway, his lawyer also spoke to a newspaper in Iran, so I think it's hard to argue that he was arrested and tried for something. Whether it was specifically for the dot thing is, I guess, the main thing that one could speculate on, if you were particularly distrustful of the sources.
