"Pierre knew all the details of the attempt on Bonaparte's life in 1809 by a German student in Vienna"

On the 12th October 1809, after a parade in Vienna, Napoleon wrote the following to the Police Minister Fouché:

"A young man of seventeen years, son of a Lutheran minister from Erfurt, tried, at the parade today, to approach me. He was stopped by officers, and, noticing a suspicious nature in him which aroused suspicions, he was searched, upon which a dagger was discovered. I had him brought before me, and this miserable scoundrel, who [nevertheless] appeared reasonably educated, informed me that he intended to assassinate me to deliver Austria from French presence."

The young man was Fredriech Staps, a German. He was offered a stay of execution if he asked for pardon, but refused, and was executed by firing squad shortly afterwards.