In '58 he was prosecuted for publishing a pamphlet on tyrannicide, by W. E. Adams, but the prosecution was abandoned.
"A Biographical Dictionary of Freethinkers of All Ages and Nations"
Joseph Mazzini Wheeler
Odo had heard little of this execrated league, but that it was said to preach atheism, tyrannicide and the complete abolition of territorial rights; but this, being the report of the enemy, was to be received with a measure of doubt.
"The Valley of Decision"
Edith Wharton
Upon this anarchy of religion, morals, and conduct breathed suddenly the inspiring breath of Pagan antiquity which seemed to the Italian mind to find its finest climax in tyrannicide.
"Machiavelli, Volume I The Art of War; and The Prince"
Niccolò Machiavelli