"Pleading for asylum from U.S. officials he says want to persecute him, NSA leaker Edward Snowden told Ecuadorian officials that he fears a life of inhumane treatment -- even death -- if he's returned the United States to answer espionage charges, the country's foreign minister said Monday."
Snowden isn't afraid of being found guilty and serving a reasonable sentence. He's afraid of disappearing into a secret dungeon and tortured for decades. Which is a thing the USA has been proven to do. Recently. To people who have upset the government way, way less than he has.
It's a legit fear.