On April 15, 1863, the Kingdom of Sardinia conducted a public vote, electing Napoleon III as King, marking the beginning of France's annexation of the Kingdom of Sardinia.
There is no doubt that the referendum was not a universal participation; only those who were eligible to vote were the social elites who supported France.
More than six hundred delegates from the Kingdom of Sardinia unanimously elected Napoleon III as King. When this number of votes was magnified ten thousand times and rounded up, it became the "entire Sardinian People" who elected Napoleon III as their King.
Prior to this, all those involved in the regicide case had already been tried, with the dead dead, the imprisoned jailed, and the fugitives wanted.
In short, regicides must go to hell, a common will shared by all monarchies.
As for the truth of the matter, it was no longer important, as all traces had been dealt with by the French. It was impossible to overturn the case now.