death by firing squad
i'd opt for something for subtle, say fed to hyenas?
Hm, an extremely slow build up on an electric chair
drag out the pain
he should suffer the same fate as Louis XV's would-be assasin, Robert-François Damiens:
"before the torture, on 28 March 1757, he said "the day will be hard".[cite this quote] He was tortured first with red-hot pincers; his hand, holding the knife used in the attempted assassination, was burned using sulphur; molten wax, lead, and boiling oil were poured into his wounds. Horses were then harnessed to his arms and legs for his dismemberment. Damiens' limbs and ligaments did not separate easily; after some hours, representatives of the Parlement ordered the executioner and his aides to cut Damiens' joints. Damiens was then dismembered, to the applause of the crowd. His torso, apparently still living, was then burnt at the stake."
http://en.wikipedia.org/wiki/Robert-Fran%C3%A7ois_Damiens jk
