the residenz was under surveillance by the police of bamberg, no disguised people were allowed to enter, visit the place - as I did and you would know how easy it is to surveille.
The police reports don't indicate such a thing.
Berthier was guest of is father in law and under protection of the Bavarian King, he is burried by the way in the family grave side of the Wittelsbacher and not in Paris.
The assasination plot is fantasy.
But wait a minute, the whole scheme was plotted by Sidney Smith and in reality Figner shot with an air gun Berthier through the head, he fell out of the window crushed his skull and so all traces of murder were eliminated