If Snowden returned to the US he would have a very public trial where his guilt would be assessed. He cannot be disappeared. He would have an opportunity to go before a jury and make his case.
Yeah, like Bradley Manning had a very public trial..
Snowden can most certainly be disappeared. He is charged under the espionage act, which would allow his trial to be conducted in complete secrecy. Perhaps you should do some research before coming up with such wild allegations.
"Experience has proved that some people indeed know everything." -- Russell Baker