Why is Bush still free?

We finally locked up the notorious Dennis Rader, the famed BTK serial killer. Hooray! After all, he murdered 10 people! But the most heinous serial killer of all, George W. Bush, is still walking around a free man! He has needlessly killed hundreds of thousands and left a nation in shambles! His opposition to stem cell research may result in trmendous suffering for millions of people far into the future. His economic policies which favor big business over the individual will leave us and our grandchildren striving to survive! If a non-leader-of-the-free-world did one one thousand of the things Bush does he would be executed immediatly. Why not do the same to Bush???