The Existentialist Cowboy: Bush Could be Executed For War Crimes

"It was because Bush knew he was guilty that he (tried) to ram through Congress amendments to the War Crimes Act that would exonerate him EX POST FACTO. Ex post facto laws are unconstitutional. Bush defenders will waste their time trying to convince me that ex post facto prohibition applies only to those laws making one prosecutable for acts that were legal at the time of commission. In other words, if it was legal to spit on the sidewalk at the time you did so, you are immune to prosecution under any law passed after you had so spit! Clearly --Bush can not commit murder now and expect to escape prosecution by making it legal after his crime of murder. Don't confuse this with amnesty, which, to my knowledge, Bush has not sought. Rather, Bush has tried to rewrite both laws and history. He tried to make legal those capital crimes that he had already committed."

From "Is George Bush Guilty of War Crimes...and Who Cares?":

"Whenever someone publicly suggests that President Bush and other members of his administration might have committed war crimes, he or she is accused of being a wild, over-the-top extremist. But there is one group of people that has always taken the war crimes charges seriously--the members of the Bush administration themselves. They have good reason for doing so, because they have exposed hundreds of Americans to possible prosecution for violating U.S. law.

From the very beginning of the war against terrorism, George W. Bush and his administration knew that the tactics and techniques they planned to use were illegal according to U.S. law. Rather than reject these tactics and techniques, they prepared a series of convoluted legal rationales that they hoped would protect them from prosecution... 

...As long as George Bush is president and controls the Department of Justice, there will no prosecutions for war crimes, but after Bush is gone, anything could happen and hundreds of Americans could be charged with war crimes." (Emphasis Mine in both quotes.)